AP Psychology Quiz: Operant Conditioning

What this quiz covers

This quiz focuses on Operant Conditioning, giving you a quick way to practice the rules, question types, and explanations that matter most for AP Psychology.

How to use this quiz

Try each quiz question before looking at the correct answer. Use the explanations to review missed ideas, then come back to similar questions until the pattern feels familiar.

Question 1

1. Fixed-ratio schedule: dessert delivered after a set number of responses, here completing a defined amount of eating. (correct answer)
2. Variable-interval schedule: dessert available after varying time intervals, regardless of vegetable completion.
3. Fixed-interval schedule: dessert after a set time at the table, producing scalloped eating patterns.
4. Positive punishment: adding dessert after vegetables to decrease vegetable-eating in the future.

Explanation: This represents a fixed-ratio schedule because dessert is delivered after a set "amount" of behavior - completing all the vegetables each night. While it might seem different from typical examples like "every 5 responses," completing all vegetables constitutes a defined behavioral requirement that must be met for reinforcement. Fixed-ratio schedules can involve completing a task or meeting a criterion rather than just counting discrete responses. This schedule should produce consistent vegetable-eating behavior with the child working steadily toward the completion requirement each evening to earn dessert.

Question 2

1. Fixed-interval schedule: reinforcement delivered after a set time period, such as every two weeks. (correct answer)
2. Variable-ratio schedule: reinforcement after unpredictable numbers of tasks, producing very high responding.
3. Fixed-ratio schedule: reinforcement after a set number of responses, such as every 20 items completed.
4. Negative reinforcement: removing an aversive stimulus after working, increasing work through relief.

Explanation: This paycheck system follows a fixed-interval schedule because reinforcement (payment) is delivered after a fixed time period (two weeks) regardless of the amount or quality of work performed during that time. Fixed-interval schedules are based purely on time elapsed, not on the number of responses made. This schedule typically produces low response rates immediately after reinforcement with gradually increasing activity as the next reinforcement opportunity approaches. Many salary systems operate on fixed-interval principles, which can sometimes lead to decreased motivation since pay is not directly tied to performance level.

Question 3

1. Extinction: sales behavior decreases because the reinforcing consequence (bonus) is no longer provided. (correct answer)
2. Positive reinforcement: adding bonuses after sales to increase sales, which is the opposite of the scenario.
3. Negative reinforcement: removing bonuses after sales to increase sales through relief from rewards.
4. Fixed-ratio schedule: bonuses delivered after a set number of sales, which would not explain their removal.

Explanation: The gradual decline in sales behavior represents extinction, where a previously reinforced response decreases when reinforcement is no longer provided. The sales staff had learned to make sales because they were reinforced with bonuses, but when bonuses are discontinued, the behavior that was maintained by this reinforcement gradually decreases. Extinction occurs when the contingent relationship between behavior and reinforcement is broken. This demonstrates why consistent reinforcement systems are important for maintaining desired workplace behaviors - removing reinforcement typically leads to decreased performance.

Question 4

1. Primary reinforcer: inherently rewarding stimulus like sweet taste, increasing sucking without prior learning. (correct answer)
2. Secondary reinforcer: learned reward requiring association with other reinforcers to be effective.
3. Negative punishment: removing sweetness after sucking to decrease sucking behavior.
4. Fixed-ratio reinforcer: delivered after a set number of sucks, regardless of sweetness' innate value.

Explanation: The sweetened liquid is a primary reinforcer because it satisfies a biological need and is inherently rewarding without requiring any learning or association with other stimuli. Primary reinforcers like sweet tastes, food, water, and warmth naturally strengthen behavior because they fulfill basic physiological requirements. Infants are born with the capacity to find sweet tastes reinforcing, making the sucking behavior increase naturally. This contrasts with secondary reinforcers, which must be learned through association with primary reinforcers or other valued outcomes.

Question 5

1. Negative reinforcement: an aversive stimulus is removed after homework, increasing future homework completion through relief from something unpleasant.
2. Positive reinforcement: a desirable stimulus (extra recess) is added after homework, increasing the likelihood of completing homework again. (correct answer)
3. Positive punishment: an aversive stimulus is added after homework, decreasing the likelihood the student completes homework in the future.
4. Negative punishment: a desirable stimulus is removed after homework, decreasing the likelihood of completing homework next time.

Explanation: This scenario demonstrates positive reinforcement, where a desirable stimulus (extra recess) is added following the target behavior (completing homework). In operant conditioning, reinforcement always increases the likelihood of a behavior recurring, while punishment decreases it. Since homework completion increased after earning extra recess, this must be reinforcement rather than punishment. The term "positive" indicates something is being added (the extra recess time), not that it's necessarily pleasant, though in this case it is. This differs from negative reinforcement, where an aversive stimulus would be removed to increase behavior.

Question 6

1. Variable-ratio schedule: reinforcement after an unpredictable number of responses, maintaining persistent responding. (correct answer)
2. Fixed-interval schedule: reinforcement after a set time, causing responding to increase near availability.
3. Negative punishment: removing a desired item after defeating enemies to decrease defeating behavior.
4. Fixed-ratio schedule: reinforcement after a set number of defeats, such as every tenth enemy.

Explanation: Gaming rewards that occur after an unpredictable number of enemy defeats operate on a variable-ratio schedule. The player never knows whether the rare item will drop after the 5th defeat, the 25th, or the 100th - the number varies unpredictably around some average. Variable-ratio schedules produce the highest response rates and greatest resistance to extinction because the next response could always be the one that pays off. This schedule maintains persistent, high-rate responding and explains why gaming can become so engaging and potentially addictive.

Question 7

1. Fixed-ratio schedule: reinforcement follows a set number of responses, such as every third correct sit. (correct answer)
2. Variable-ratio schedule: reinforcement follows an unpredictable number of responses, averaging three sits.
3. Fixed-interval schedule: reinforcement becomes available after a fixed time period, regardless of response count.
4. Negative reinforcement: removing an aversive stimulus after sitting, which increases sitting behavior.

Explanation: This scenario describes a fixed-ratio (FR-3) schedule of reinforcement. In fixed-ratio schedules, reinforcement is delivered after a predetermined, constant number of responses. Here, the dog receives a treat after every third correct sit, making this an FR-3 schedule. Fixed-ratio schedules typically produce high response rates with brief pauses after reinforcement (post-reinforcement pauses). This differs from variable-ratio schedules where the number of responses needed varies unpredictably, and from interval schedules which are based on time rather than number of responses.

Question 8

1. Discriminative stimulus: signals that a response will be reinforced under current conditions, guiding lever-pressing. (correct answer)
2. Primary reinforcer: inherently rewarding stimulus like food, directly strengthening lever-pressing without learning.
3. Positive punisher: adds an aversive stimulus after pressing to decrease lever-pressing.
4. Variable-ratio cue: indicates reinforcement after unpredictable response numbers, not whether reinforcement is available.

Explanation: The light functions as a discriminative stimulus (SD) because it signals when lever-pressing will be reinforced. Discriminative stimuli don't directly strengthen behavior like reinforcers do; instead, they provide information about when reinforcement is available. The rat learns that pressing the lever will produce food only when the light is on, so the light guides or occasions the lever-pressing response. Discriminative stimuli are crucial for stimulus control - they help organisms learn when and where particular behaviors are likely to be successful, making behavior more efficient and appropriate to environmental conditions.

Question 9

1. Fixed-ratio schedule: praise after a set number of tasks, causing brief pauses after reinforcement.
2. Variable-interval schedule: praise becomes available after varying time intervals, encouraging steady work. (correct answer)
3. Positive punishment: adding praise to reduce working, which would decrease the behavior.
4. Fixed-interval schedule: praise becomes available after a fixed time period, producing scalloped responding.

Explanation: When a supervisor praises employees at unpredictable times, this creates a variable-interval schedule of reinforcement. In variable-interval schedules, the first response after a varying amount of time has passed is reinforced. Since employees never know when the supervisor might walk by and observe their work, this maintains steady, consistent work behavior. Variable-interval schedules typically produce moderate but very stable response rates because the reinforcement could become available at any time, encouraging continuous engagement with the task.

Question 10

1. Variable-interval schedule: the first check after unpredictable time intervals is reinforced by message arrival, supporting steady checking. (correct answer)
2. Variable-ratio schedule: reinforcement occurs after an unpredictable number of checks, so each check is rewarded after random response counts.
3. Fixed-interval schedule: the first check after a set time is reinforced, causing a predictable surge only near the interval's end.
4. Fixed-ratio schedule: reinforcement after a set number of checks, producing bursts of checking separated by post-reinforcement pauses.

Explanation: Email checking maintained by random message arrivals follows a variable-interval (VI) schedule, where the first response (checking) after varying, unpredictable time intervals is reinforced by finding new messages. This schedule produces steady, moderate response rates without the post-reinforcement pauses seen in fixed schedules. Workers check consistently because they never know when the next message might arrive, but checking multiple times in quick succession won't produce more messages. This differs from variable-ratio schedules where more responses could yield more reinforcement. The unpredictable timing maintains persistent checking behavior, demonstrating how operant principles shape modern workplace behaviors differently than classical conditioning's stimulus-response associations.

Question 11

1. Positive punishment: adding an aversive consequence (fine) after late returns to reduce late returning. (correct answer)
2. Negative reinforcement: removing $5 after late returns to increase late returning behavior.
3. Positive reinforcement: adding a fine after late returns to increase late returning in the future.
4. Fixed-ratio schedule: fines occur after a set number of late returns, like every third late return.

Explanation: The library fine functions as a positive punisher because it adds an aversive consequence (losing money) after the undesired behavior (returning books late), which decreases the frequency of late returns. Positive punishment involves presenting an unpleasant stimulus following a behavior to reduce that behavior's future occurrence. The $5 fine is effective because losing money is aversive to most people. This differs from negative punishment (removing something desirable) and reinforcement procedures (which increase behavior). The decrease in late returns demonstrates the fine's effectiveness as a punisher.

Question 12

1. Fixed-ratio schedule: reinforcement after a set number of responses, such as every 50 products assembled. (correct answer)
2. Variable-ratio schedule: reinforcement after an unpredictable number of products, averaging 50.
3. Variable-interval schedule: reinforcement after varying time intervals, regardless of output count.
4. Negative punishment: removing a bonus after assembling products to decrease assembling behavior.

Explanation: A bonus given after every 50 products assembled follows a fixed-ratio (FR-50) schedule. In fixed-ratio schedules, reinforcement occurs after a predetermined, constant number of responses. The worker must complete exactly 50 products to earn each bonus, regardless of how long this takes. Fixed-ratio schedules typically produce high response rates because more work directly leads to more reinforcement, though there may be brief pauses after each bonus is earned (post-reinforcement pauses). This type of schedule is common in piecework compensation systems where pay is directly tied to output quantity.

Question 13

1. Variable-interval schedule: first check after varying time intervals is reinforced by occasional new messages. (correct answer)
2. Fixed-ratio schedule: new messages appear after a fixed number of checks, like every tenth refresh.
3. Positive punishment: adding emails after checking to reduce checking by overwhelming the student.
4. Fixed-interval schedule: new messages appear exactly every 30 minutes, producing predictable scalloping.

Explanation: Email checking behavior is maintained by a variable-interval schedule because new messages arrive after unpredictable time periods. The student doesn't know whether checking will reveal new messages after 5 minutes, 2 hours, or any other interval - it varies unpredictably. Variable-interval schedules produce steady, moderate response rates because reinforcement could become available at any time, but the rate is not as high as variable-ratio schedules. This explains why people check email, social media, and other communication platforms consistently throughout the day.

Question 14

1. Positive punishment: adding an aversive consequence (detention) after talking, decreasing future talking. (correct answer)
2. Negative reinforcement: removing detention after talking, increasing future talking behavior.
3. Positive reinforcement: adding detention after talking, increasing future talking behavior.
4. Fixed-interval schedule: detention delivered after set time periods, unrelated to the talking response count.

Explanation: This scenario demonstrates positive punishment, where an aversive consequence is added after a behavior to decrease its future occurrence. The student receives detention (an unpleasant experience) following talking in class, and this added consequence reduces talking behavior. Positive punishment involves presenting an aversive stimulus contingent on the behavior. This differs from negative punishment (removing something desirable) and reinforcement procedures (which increase rather than decrease behavior). The detention serves as a punisher because it successfully reduces the targeted behavior.

Question 15

1. Fixed-interval schedule: the first lever press after a fixed time (60 seconds) is reinforced, often producing scalloped response patterns. (correct answer)
2. Variable-ratio schedule: food follows an unpredictable number of lever presses, yielding very high, steady pressing without timing effects.
3. Fixed-ratio schedule: food follows every set number of presses, so the rat must press a certain count regardless of time.
4. Variable-interval schedule: the first press after varying time intervals is reinforced, producing steady responding with little scalloping.

Explanation: This describes a fixed-interval (FI-60) schedule, where the first response after a fixed time period (60 seconds) is reinforced. This schedule typically produces a "scalloped" response pattern - the rat presses very little right after receiving food, then gradually increases pressing as the 60-second mark approaches. The rat learns to time the interval and doesn't waste energy pressing when food is unavailable. This differs from fixed-ratio schedules based on response count, and from variable schedules where timing is unpredictable. Fixed-interval schedules are common in real life, like checking for mail delivery that arrives at a consistent time.

Question 16

1. Fixed-ratio schedule: payout after a predictable, set number of pulls, typically producing brief pauses after each reinforcement.
2. Fixed-interval schedule: payout for the first pull after a fixed time period, producing a scalloped increase near payoff time.
3. Variable-ratio schedule: payout after an unpredictable number of pulls, producing high and resistant-to-extinction responding. (correct answer)
4. Variable-interval schedule: payout for the first pull after varying time intervals, producing steady, moderate response rates.

Explanation: Slot machines operate on a variable-ratio (VR) schedule, where reinforcement (payout) occurs after an unpredictable, varying number of responses (lever pulls). This schedule produces the highest, most persistent response rates and is highly resistant to extinction, explaining why gambling can become so addictive. The gambler never knows which pull will pay off, maintaining hope and continued responding. Unlike fixed schedules where patterns are predictable, or interval schedules based on time, variable-ratio schedules keep people engaged because 'the next one might be the winner.' This powerful operant conditioning principle differs fundamentally from classical conditioning's reflexive responses, as gambling involves voluntary, persistent behavior maintained by intermittent reinforcement.

Question 17

1. Positive punishment: adding an aversive stimulus (soap taste) after swearing to decrease swearing. (correct answer)
2. Negative reinforcement: removing soap after swearing to increase swearing through relief.
3. Negative punishment: removing a desirable stimulus after swearing by adding soap to the mouth.
4. Variable-interval schedule: soap is applied after varying time intervals, not contingent on swearing.

Explanation: Washing the child's mouth with soap represents positive punishment because it adds an aversive stimulus (unpleasant soap taste) following swearing to decrease this behavior. The soap creates an unpleasant experience contingent on swearing, which reduces future swearing behavior. Positive punishment involves presenting aversive consequences after undesired behaviors. While this particular method is controversial and not recommended by modern parenting experts, it technically fits the definition of positive punishment because something unpleasant is added to decrease behavior frequency.

Question 18

1. Fixed-interval schedule: reinforcement is tied to a predictable time, producing scalloped increases near the quiz. (correct answer)
2. Fixed-ratio schedule: reinforcement after a set number of study sessions, producing rapid responding with pauses.
3. Negative punishment: removing a desired activity after not studying, which decreases not-studying behavior.
4. Variable-ratio schedule: reinforcement after unpredictable study amounts, producing consistently high studying.

Explanation: This scenario illustrates a fixed-interval schedule where reinforcement (good quiz performance) becomes available after a predictable time period (every Friday). Fixed-interval schedules characteristically produce a "scalloped" response pattern where behavior is low immediately after reinforcement and gradually increases as the next reinforcement opportunity approaches. Students typically study less on Monday and Tuesday but intensify their studying on Wednesday and Thursday night, knowing the quiz is coming Friday. This creates the distinctive increase in behavior near the end of the interval.

Question 19

1. Variable-ratio schedule: reinforcement occurs after an unpredictable number of lever presses, producing very high responding with minimal pauses.
2. Fixed-interval schedule: reinforcement becomes available after a fixed time period, so responding increases as the next interval ends.
3. Fixed-ratio schedule: reinforcement is delivered after a set number of responses, such as every 10 lever presses, often producing brief pauses. (correct answer)
4. Negative reinforcement schedule: an aversive stimulus is removed after a fixed time period, which increases lever pressing regardless of response count.

Explanation: This describes a fixed-ratio schedule of reinforcement, where the rat receives a food pellet after completing a specific, unchanging number of responses (10 lever presses). This schedule typically produces high rates of responding with brief pauses after each reinforcement, known as post-reinforcement pauses. Unlike variable-ratio schedules where the number varies unpredictably, fixed-ratio schedules create predictable patterns of behavior. This differs from interval schedules, which are based on time passage rather than response count, and from continuous reinforcement where every response is reinforced. Fixed-ratio schedules are common in piece-rate work situations and demonstrate how operant conditioning principles can maintain consistent behavioral output. The predictability allows organisms to anticipate reinforcement, unlike classical conditioning where stimulus-response connections are more automatic.

Question 20

1. Extinction: a previously reinforced behavior decreases when reinforcement (attention) is withheld consistently, so tantrums become less frequent over time. (correct answer)
2. Positive reinforcement: adding attention after tantrums, increasing tantrums because the child learns that outbursts reliably produce social rewards.
3. Negative punishment: removing an aversive stimulus after tantrums, decreasing tantrums because the child experiences relief when outbursts occur.
4. Variable-ratio schedule: ignoring tantrums after an unpredictable number of outbursts, which typically produces extremely persistent tantrum behavior.

Explanation: This demonstrates extinction in operant conditioning, where a previously reinforced behavior (tantrums) decreases when reinforcement (parental attention) is consistently withheld. The child's tantrums were likely maintained by the attention they produced, even if that attention was negative, making attention the reinforcer. By removing this reinforcement, the behavior loses its function and gradually diminishes, though extinction bursts (temporary increases) may occur initially. This differs from punishment, which would involve adding aversive consequences or removing positive ones, rather than simply withholding the maintaining reinforcer. Unlike classical conditioning extinction where a conditioned stimulus loses its power, operant extinction involves learned behaviors losing their reinforcement. The process requires consistency, as intermittent attention would create a variable-ratio schedule that actually strengthens the tantrum behavior.