Would Sigmund Freud
diagnose B.F. Skinner
as being anal retentive?"
There
are two basic schools of thought within behaviorism.
The earlier one is known as the classical
school (also know as the S-R school
for "stimulus" and "response").
The name of Ivan Pavlov (Remember his
experiments with the dogs?...Does the name Pavlov
ring a bell?)
is most closely associated with this
elder school of thought. The more recent type of behaviorism is the
"operant" school of thought and practice.
The name most people associate with this view is B.F. Skinner
(Remember his experiment with rats, pigeons, and his daughter?...if
you don't know about her childrearing, you've gotta look it up).
The operant school of behaviorism believes in the Classical/SR
school's
view that a stimulus (happening)
causes a response (behavior)
to occur. However, the operant school also recognizes that what happens
AFTER
a behavior influences it's chances of happening again when the stimulus
presents itself.
| Click
here to see a cartoon about Pavlov and the S-R school
(by Gary Larson...Far Side) |
| Click here for another cartoon about Pavlov |
Applied
behavior analysis is the application of the principles of the Operant
Behaviorist school of thought (although many
recent advocates of ABA are separating themselves from the operant school,
seeing it as too impersonal)
No
more mazes and push bars for me!
regarding how behavior develops,
is maintained, and can be changed. Behaviorism
assumes that emotional and/or behavioral disorders are the result of inappropriate
learning.
In other words, the environment (including
the individuals in it) has created the aberrant behavior
by reinforcing or rewarding it. The most effective prevention and
intervention for youngsters is therefore to control the student's environment
so that the undesirable behavior no longer brings a reward, and a new and
better replacement behavior is reinforced. Maladaptive behavior is
viewed as a learned response
that can be "unlearned" by rearranging the events that come before and
after the behavior.
| Click here for biographies and contributions of important behaviorist figures |
Outsmarted
by a lab rat.
All of the material below refers to the operant school of behavior analysis.
A-B-C...It's
as easy as 1-2-3
The happenings that occur before a behavior are know as the "stimuli"
(plural form of stimulus) or "Antecedents".
They prod the Behavior
to occur. That displayed behavior is then strengthened (i.e.,
"reinforced") or weakened
by the Consequences
that follow it. A certain behavior will continue to occur only if
it is rewarded or "reinforced" (Why would someone show a behavior
if no benefit came of it?).
There are four categories of "consequences" that can follow a behavior
and thus influence it (i.e., decrease or increase it's probability
of re-occurrence). In other words, a behavior will
get stronger or weaker (perhaps even cease completely or "extinguish")
depending on what type of consequence follows it. There are four
categories of consequences: punishment,
ignoring,
positive reinforcement, and negative
reinforcement (P.S. punishment
and negative reinforcement ARE NOT
the same thing. If you once believed that they were the synonyms,
throw that thought out of your mind forever...not later...NOW!)
A teacher who administers a punishment when a kid misbehaves and then says
"I
negatively reinforced him." is mixing up terms and concepts.
| Click
here for how A-B-C model is used to assess why a student misbehaves
(Scroll down to "view #2") |
The 4 Types of Consequences
PUNISHMENT
If a behavior is punished, it will be less likely to occur in the future.
An important point to remember is that punishment is not what YOU
think is punishing...it's what THE STUDENT
who shows the behavior thinks is undesirable or aversive. For example,
some schools use suspension as a "punishment". However, if the student
enjoys being out of school where s/he can roam the streets or watch TV
all day, then the "punishment" of suspension is NOT punishing. It's
actually a reward! (reinforcement).
How do you tell if a consequence is punishing or not? Behaviorists
will tell you to watch the occurrence of the behavior...if it happens less
often, then your consequence is a true punishment.
There are some things that behaviorists forget to mention about the use
of punishment. There are MANY
drawbacks or problems with the use of punishment in getting rid of undesired
student behavior. For example:
-A
punishment must be more powerful than the benefits (e.g., attention,
power, money, desired items, etc.) the student receives from
showing the behavior. If the punishment isn't strong enough, the
behavior will still continue.
-While
punishment that out-weighs the benefits WILL
cause the behavior to stop immediately, it DOES NOT
teach new, more acceptable behavior. The youngster knows what NOT
to do, but doesn't know what TO DO
in place of that inappropriate behavior.
-While
the youngster may not show the behavior around the punisher, s/he still
shows the behavior elsewhere. A behavior pattern is not changed by
punishment. The student merely stops showing the behavior around
one person: the punisher.
-Additionally,
the student stops the behavior NOT
because s/he believes it is the right thing to do, but rather because s/he
fears you. Obeying another out of fear
is the lowest stage of moral development. There is no internal motivation
to change for the better. We have done nothing to help the student.
In fact, we may have caused emotional/psychological trauma, or in some
cases, physical harm. At the very least, we have destroyed the valued
student-teacher bond. Now you have a begrudgingly compliant student
who dislikes you, fears you, and avoids you (or is just sneaky...displaying
the undesirable behavior when you're not looking). Classic
case: Substitute teachers who face unruly classrooms of kids who
have been "controlled" by their usual teachers in a negative classroom
climate. However, "when the cat is away, the
mice will play." When the punisher is away, the oppressed
masses will show a different behavior.
There are four
"R"s that will result if you decide to use punishment:
-resentment
(the kids feel devalued and are upset at the way they are treated)
-retreat
(kids avoid you by failing to say "Hi" when they see you, cutting
your classes, etc.)
-rebellion
(kids may refuse to work for you or comply with directions)
-revenge
(students use punishment against you in a recurring battle)
So if punishment has such negative outcomes, why do most people love their parents, even though their parents punished them? Most parents provide massive amounts of positives that "outweigh" the negative aspects of punishment. Any punishment was probably viewed as being administered because the parents loved them (Parent to child: "This is gonna hurt me more than it hurts you.") or made a rare mistake in judgment. Teachers don't have the same extensive history with the kids. Educators should try to avoid punishment as much as possible while using "catching them being good" (positive reinforcement) as the main behavior management tool.
It's difficult to change
punishers to effective behavior managers. Folks who frequently use
punishment and coercion tend to be black and white, either/or, concrete
thinkers. They think that if you're not punishing an inappropriate
behavior, you're letting the kids "get away with it". They fail to
see the hundreds or thousands of other interventions that could be used
(Please direct these folks to this web site!).
The mean teachers also get "reinforcement" from punishing: the behavior
stops (at least around them...although the behavior usually reoccurs...coercive
teachers soon find them selves saying "How many times
do I have to punish you to get you to stop?" The answer is
"Forever" because punishment does not
teach a student what s/he OUGHT
to be doing in that situation.). As Mark Twain once
said: "To a man with a hammer
,
everything looks like a nail." These people need to add some
more tools to their behavior management tool box.
IGNORING
You've heard it before: "Ignore the behavior and
it will go away." Maybe you've followed this adage but experienced
limited, if any success. Yes; if done effectively, ignoring will
reduce a behavior and cause it to eventually die out ("extinguish").
However, certain conditions and cautions need to be observed.
First, the student
must be trying to gain your attention.
If the student is satisfied with attention from others
(i.e., laughter
from other kids or yelling/pleading from your para- professional),
then you can ignore all you want, but it will have no effect. Also,
some behaviors are self reinforcing. When an autistic youngster is
rocking, or a teenager's hand goes down the front of his pants, they would
prefer that you DO ignore them.
The behavior feels good, so they don't want to be interrupted! When
kids say nasty things to other kids, they are exerting power over others.
If you ignore this behavior, it will continue because the benefits of being
powerful still occur. In order for the procedure of ignoring to work,
ALL
incoming attention and benefits must be withdrawn. This plan would
mean that other students and faculty must also ignore the behavior.
The plan of total ignoring described above is not easy to implement.
The only thing that is needed to ruin your ignoring plan is for another
educator, walking by your room, seeing the student engaged in the behavior,
and trying to help you by chastising that misbehaving student.
There is also the phenomenon of the "behavioral burst". When students are ignored, they tend to escalate the behavior in an attempt to gain the desired attention. The ignored behavior increases in intensity and frequency...often for quite a long period until the student finally realizes that inappropriate behavior won't bring the usual rewards. (In one study, staff in a residential setting for severely retarded individuals believed that a client's head banging behavior was an attempt to gain staff attention in a place in which bizarre/severe behavior tends to get attention...not appropriate behavior. They decided to ignore the head banging instead of rushing over to restrain the individual. The client banged his head over 9000 times before finally stopping.)
Imagine the newly ignored youngster who doesn't get the usual attention. S/he thinks that you are probably tired or somewhat distracted that day. To help tip you off, s/he shows a stronger, more intense version of the usual behavior. You ignore this behavior too. The kid then shows a more frequent and powerful version. You ignore it too. Finally, the kid thinks "OK teacher, ignore THIS!!!" (showing you a behavior that is far out-of-bounds). You might be able to ignore a student who states answers without raising his/her hand, but can you ignore the student when s/he yells out the answer? You can ignore a student who pesters others, but can you ignore the same student when s/he throws something at others or hits them? If you do finally react to the new and more intensive behavior, you've just created a new and worse behavior than you had to deal with before. You've just reinforced a worse behavior than the one you disliked. Now the student knows to go directly to that more severe behavior to get attention. You're in for an awful time.
If you are going to
ignore, you have to be able, in the words of a past U.S. President, "Stay
the course."
.
It will be difficult and fraught with problems...for example, you might
have convinced the other students to ignore the behavior of an offending
student. They'll try to help you by being inattentive to the irritating
behavior...UNTIL
they become so irritated
with the escalation in the behavior that they
shout out "Stop that!!" Now they've
just reinforced (rewarded)
the more intense version of the behavior, creating the likelihood that
it will occur again. OR...perhaps the other students think that if
you're failing to react to a certain behavior it must be OK
for THEM to show the behavior. Now you've
got a whole classroom of kids showing the undesirable behavior! Yikes!!!
To be successful in
ignoring (this means
NO
attention>>>NO explaining, NO
pleading, NO scolding),
you must also be doing something else at the same time....catching
other kids being good (hoping to lure the misbehaving student
into showing the correct behavior in order to get your attention).
Be sure to check out the following links on the home page of this site:
"Different ways to catch ‘em being good",
and "Problems with catching ‘em being good".
| Click here to read an example of how a teacher used ignoring to eliminate hitting behavior |
| Click here to read an example of how a teacher used planned ignoring with an attention seeking pre-schooler. |
| Click here to read an example of planned ignoring with a girl who rips things off of wall to gain teacher attention |
Reinforcement
So what
makes negative reinforcement different from positive reinforcement?
Well, both make someone feel good.
Positive reinforcement is the acquisition of something
the person wants.
Negative reinforcement is
the avoidance of something the person dislikes. If a student
shows a behavior that avoids something undesirable, then his/her behavior
is "negatively reinforced" (and strengthened).
In other words: It feels good not
to
be punished. It is reinforcing to avoid a bad thing.
Below,
you'll find more information on each type of reinforcement.
POSITIVE
REINFORCEMENT
Talking about catching ‘em being good...The proper use of positive reinforcement
will increase the likelihood of the rewarded behavior happening again in
the future. Essentially, if the student receives something that s/he
views as being desirable, the behavior that acquired that reward will be
shown again. Again, it is important to remember that it is NOT
what WE think would be reinforcing (rewarding),
it is what the STUDENT views as being
desirable. Don't know what they find to be reinforcing? Just
ask them via verbal questioning or a checklist/survey known as a "reinforcement
inventory".
You can create your own or purchase published ones.
To see a listing of rewards and instructions for weaning kids from lower level reinforcers (e.g., food, money, tokens, stickers) to higher level ones (e.g., social praise, love of learning) go to the home page on this site and click on the link titled "Weaning kids from rewards and developing internal motivation".
NEGATIVE
REINFORCEMENT
OK, listen up. Negative reinforcement
is one of the more difficult behavior management concepts/procedures to
comprehend.
First of all, note the word "reinforcement" in the term. We know by this wording that something rewarding must be occurring. So therefore, negative reinforcement and punishment CANNOT be the same thing. Punishment is when we do something to the student's behavior that s/he doesn't like. We know by the inclusion of the word "reinforcement" in the term "negative reinforcement" that we must be doing something that the student finds rewarding. Therefore, negative reinforcement will have the same result as positive reinforcement...the behavior will increase in frequency and/or intensity in the future.
Now for the other part of the term. As you might expect, the word "negative" implies that this way of reinforcing behavior is not as nice as when we use "positive" reinforcement. Yes, somehow something awful/undesirable is involved, but NO PUNISHMENT TAKES PLACE when a behavior is "negatively reinforced". In fact, we reinforce the behavior by taking away a threatened punishment IF the student shows the correct behavior.
WHAT!?!?!?!
OK, let me explain it in a number of different ways. Grab onto the
one you understand, and then expand your understanding from that point.
First, here's the definition in precise behaviorist terms: "The
removal of an aversive stimuli (consequence)
contingent
upon the display of an identified action." In simpler words:
"If
you show the behavior I want to see, I won't punish you."
It feels good not to be punished. The punishment
never happens
and that is reinforcing (rewarding). Below,
you will find other attempts to explain "negative
reinforcement".
Explanation
#1
Negative reinforcement
occurs when a student shows an appropriate behavior in order to make the
threat of punishment go away. The student shows the correct behavior
to avoid being punished if s/he doesn't do so. In other words, reinforcement
is happening...it feels good
not
to be punished. It's not the nicest way to give reinforcement (it's
not POSITIVE reinforcement). Instead, it is
a rather NEGATIVE way to reinforce a kid (thus the term NEGATIVE
REINFORCEMENT).
Explanation
#2
Negative reinforcement
is the removal of something awful (or the threat of it)
if the student shows an appropriate behavior.
Explanation
#3
A behavior is "negatively
reinforced" if a student shows a behavior to keep something awful from
happening, or if it is already happening...make it go away.
Explanation
#4
You threaten a student
with punishment unless s/he does as told. The student shows the behavior
you demanded. That exhibited behavior made the threatened punishment
go away. That displayed behavior brought about reinforcement (a
feeling of relief at having "dodged the bullet"). It
feels good (reinforcement) not to be punished (something
negative). The removal of that negative is reinforcing...thus
"negative reinforcement" of the displayed behavior. We will see more
of that behavior in the future to avoid punishment.
Explanation
#5
The student's action
keeps a negative thing (in his/her mind) from happening.
Explanation
#6
It's a negative way
of reinforcing someone.
Behaviorism's focus is on the behavior, not the person. Because of that focus, some cruel experiments and interventions have been conducted in the past. Today, restrictions on the procedures have been developed to guide practice (although some violations are still found on an infrequent basis) There is a famous early behaviorist experiment using negative reinforcement which would violate today's guidelines. Here's that example:
A room is prepared with a metal grate covering the whole floor area. In one corner of the room is a chair on a rubber mat. An autistic child is placed in the room which now contains his mother seated on the chair. The door is closed behind the boy and locked. Outside, the "therapist" flips a switch that sends a mild electric current through the metal grid on the floor. The bare-foot youngster feels the sting on his feet. He jumps wildly and runs about the room looking for relief. It is finally found on the isolated rubber mat containing mom seated in the chair. The current is turned off. The child is removed from the room. He is placed inside the room again and five seconds elapses before the switch is turned on, again sending electricity through the metal mesh floor. The child runs to the mat again for relief. Over many more trials, the mat is made smaller and smaller until the child must climb up on mom's lap to escape the punishment of the electricity. In this situation, the behavior of being away from the mother was punished with electrical shock. The behavior of going to mother and physical contact with mom (something often absent in autistic children) was created via negative reinforcement (going to mother makes the punishment go away).
Most cultures of the world use negative reinforcement prominently in their child raising. You may have heard some variation on this wording: "Do it or else." You then did it (showed the behavior your parents wanted to see) to avoid the "or else" (the threatened punishment). Your behavior was reinforced (strengthened) and occurred again in the future to avoid the negative thing your parents used to threaten you. (But I'll bet you showed the "bad behavior" elsewhere when no punisher was around.)
Our legal system operates on negative reinforcement. Police officers don't pull you over when you're driving safely to give you a "certificate of good driving" (positive reinforcement). However, if you show the wrong driving behavior (e.g., speeding, going past a stop sign without stopping), you can be punished. Many people drive safely to avoid the punishment (a "ticket" and monetary fine). Their proper driving behavior is negatively reinforced (good driving practices keep the punishment away).
So why do some people speed? The benefits of speeding (i.e., quicker travel time) outweigh the inconsistently enforced penalties. Speeders gamble that they will be able to avoid the punishment. They'll slow down when they see on-coming traffic flash their headlights (indicating a "speed trap" ahead)...remember, offenders avoid showing the wrong behavior around the punisher...but they'll keep doing the wrong behavior when the punisher is not around. It only take a few seconds beyond the speed trap to get back up to the high speed again.
Sometimes a behavior
is strengthened even more quickly and strongly via a "double dose" of reinforcement...positive
AND negative reinforcement happening at the
same time. For example, if you become a skilled behavior manager
you gain more compliance and on-task behavior from the students (positive
reinforcement) while non-compliant and off-task behavior
(punishment) go away (negative reinforcement
of using good behavior management).
Some
Concerns About Behaviorism and ABA
Applied
behavior analysis, behaviorism's answer to paint-by-the-numbers art, has
offered special educators (and others) a myriad of
effective techniques that have enhanced the education of youngsters with
learning and behavioral impairments. However, you must master many
other methods and approaches to become an accomplished artist in the behavior
management medium. To create a classroom masterpiece, you need to
be able to dip your behavior management brush into a palate that contains
more than just black and white. Behaviorist techniques are best suited
to fill the canvas of those learners with severe cognitive impairments
and conditions such as autism. Their techniques lose effectiveness
when used with older youngsters and those who are more cognitively able.
There
are certain other concerns and qualifications that I feel the need to voice.
This blaspheme often brings forth great consternation from fanatic behaviorists.
In their minds, behaviorism, with it's "antecedent - behavior - consequence"
series of events is a fact...it's proven! When I question behaviorism,
many dyed-in-the-wool, card-carrying behaviorists look at me like I'm questioning
gravity. I suggest that we ought to ask ourselves: "How do I know
that gravity is pulling me down?"
Perhaps
I'm being pushed!
Behaviorists (and
you know who you are)
attempt to explain all strategies, even those derived from other viewpoints,
in their own terms and theoretical orientation. They claim to have
a model that covers everything...sort of like my grandmother's nightgown.
However, extending this ownership to techniques that they do not typically
recommend to those in training is equivalent to bragging about having seduced
women they have never met. For example, behaviorists seeing a nice
teacher having positive interaction with a youngster will say that the
interaction style in a "reinforcer". However, behaviorist professors
do not teach future teachers how to be "nice". Students in teacher
training programs with a strong behaviorist bent are not taught counseling
techniques, reflective listening, "I messages", using encouragement, etc.,
which are the very things that result in the positive interaction.
They should listen to the advice of their mothers and former teachers:
You shouldn't take credit for something you haven't done.
My concern,
as is probably becoming apparent, is with the closed minds of staunch behaviorists.
They tend to view schools as being Skinner boxes with cafeterias.
It seems that while the eminent Dr. Skinner has gone to the big laboratory
in the sky, his rats live on (Given that his experiments were conducted
at Harvard, I suspect that the cheese fed them was probably Brie).
By the same token...(Oops, sorry behaviorists...no pun intended)...I am concerned about the attitude of many behaviorists who remain psychologically and personally removed from those youngsters with whom they work. Indeed, my research has found 96% of behaviorists testing positive for crankiness. The behaviorists who are most effective are those who also relate well to kids and interact with them on a personalized basis, approaches not taught in typical behaviorist teacher preparation programs. A teacher must become more than an ice cube with a clip board. While reading this article, try to understand that there are many valid and effective ways of changing behavior...not all of them based on a behaviorist viewpoint. "One size fits all" is a lie in fashion... and in education.
Perhaps I should be placed on a program to prevent me from writing more articles like this one. Behaviorists could use their "A-B-A-B research design" to prove the effectiveness of their intervention...Take baseline (pre-intervention/1st A) data; implement the intervention (1st B) and take data; remove the intervention and take data (2nd A); and then re-implement the intervention (2nd B) and take data. If the intervention is effective, we should see a change in the behavior during the "B" (intervention) stages, and a return to intial rates of the behavior during the "A" (no intervention) phases. That up-and-down display of behavior (according to behaviorists) proves the effectiveness of the intervention. However, ask yourself: "Would I purchase a reading program for my school if the kids only read better when I was using it (the intervention phases), but then returned to their previous reading levels when the curriculum was withdrawn?"
The traditional behaviorist school of thought is not concerned with a person's mental state, because it cannot be measured (Behaviorists prefer to deal only in terms of observable and measurable behaviors. Emotions can not be reliably measured.). The emotional and/or psychological impact of interventions is rarely considered, and a common defense of their practice is that "The kid will be emotionally better in the long run because the better behavior will make him/her more socially acceptable to others."
Behaviorism is "big brother"ish. There is the belief that behavior should be changed for the common good (Ironically, behaviorism reached it's peak popularity around 1984!).
Applied behavior analysis
is predicated on a European American male view of the world. It is
logical, rational, and mechanical in nature. There is a "cause and
effect" empirical orientation which belittles "less valid", non-scientific
views on the world (e.g., a common American Indian belief system
recognizes the impact of paradox, mystery, and other-world influences on
behavior, etc.) For more information on how the use
of ABA procedures may be culturally insensitive and inappropriate for minority
culture students, see this site's home page link titled "Culture,
gender, and orientation". Then click on the sub-link to cultural
issues in the use of behaviorist procedures.
Activities
1.
Select a behavior in the situations presented below and decide whether
it has been punished, ignored, positively reinforced, or negatively reinforced.
a.
A student with Autism engages in self stimulation by waving fingers in
front of her eyes. The teacher grabs the student's hands and slaps
them, saying "Quiet hands!" The finger
waving stops (at least when the teacher is watching).
b.
You yell at a student (because you haven't yet learned better ways
to deal with misbehavior) and the behavior stops (at
least for now and around you).
c.
The students work hard on their assignments to earn the promised "10
extra minutes of recess" promised by the teacher if they do so.
d.
The teacher fails to acknowledge a student's yelling out of an answer,
calling instead on another student whose hand is raised.
2.
Explain to another person (or to yourself) how negative
reinforcement is involved in the following situations
a.
A breeze makes you chilly while sleeping. You get up and close the
window. You are now able to sleep soundly. Which behavior was
negatively reinforced? What punishment went away?
b.
You go on a diet. You lose weight. Which behavior was negatively
reinforced? What punishing thing went away?
c.
A student cuts his social studies class because he hasn't studied for the
test. What behavior made what awful thing go away (at least
for the moment).
d.
Students in a course who obtain an average of 90% on four quizzes won't
have to take the final examination. Which behavior is negatively
reinforced by making what awful thing go away.
e.
A student cheats on a test.
f.
A mother is holding her baby. Her arms begin to get tired so she
puts the baby down into the crib.
g.
The baby who was placed in the crib starts to cry.
The mother picks up the baby. Crying ceases. (Both individuals
have a behavior that is negatively reinforced)
h.
You bring home a new puppy. Your cat hisses at the puppy. The
puppy runs away.
(Both animals have a behavior negatively reinforced.)
i.
An educational evaluator enters the testing room. The child who is
to be tested starts to scream and yell and throw test materials.
The evaluator leaves the room and writes a report saying that the child
is "untestable". Both individuals had a behavior negatively reinforced.
3. You intervene upon seeing a behavior. You note very quickly that the behavior is being displayed more often by the student. Which consequence COULD NOT be in effect in this situation (the other three categories of consequence could be in effect, depending on the situation).
4. The description of the four types of consequences was made rather simple to give newcomers to this orientation/theory a basic grasp of the principles. If you understood the material, click here to go to a more accurate explanation that will give you a deeper understanding of the behaviorist view.
5.
If reinforcement strengthens a behavior
and punishment weakens a behavior, how can behaviorists explain the following
phenomenon?:
An aspiring athlete, dreaming of someday becoming an Olympic champion,
works harder after every race he loses.
He runs more, lifts weights, studies technique, etc. He unexpectedly
qualifies during the Olympic trials for his country, goes to the Olympics
and wins
the gold medal. Afterwards, he retires from racing. Why
didn't the lost races decrease his "racing behavior"? Why didn't
this sought-after reinforcement (Olympic
gold medal) keep him in the sport?
For
further study:
(The basics of ABA)
Alberto and Troutman (1990)
Applied behavior analysis for teachers.
Merrill Publishing. Presents information and procedures in humorous
and easily understood language. Filled with humorous cartoons.
(Advanced ABA) Martin
and Pear (2003). Behavior modification: What it is and how to do it.
Prentice-Hall Publishers.
| Click here for yet another review of the material |
No. This
animal is NOT a white rat.
This puppy is a direct descendant of one of Pavlov's dogs.
| Fetch
Dr. Mac's Home Page When you hear the bell
...but this time, don't drool all over the page!) |
Updated
on 2/10/05 Author: Tom McIntyre
at www.BehaviorAdvisor.com