Related Experiment Video
Updated: Aug 7, 2026

Modeling Verbal Behavior Deficits with the Stimulus Control Ratio Equation, SCoRE
Published on: May 14, 2019
The effect on the test behavior of children, as reflected in the I.Q. scores, when reinforced after each correct
1San Juan Unified School District.
Insights
Giving candy as a reward for correct answers significantly boosted intelligence test scores in young children. This study highlights the impact of positive reinforcement on cognitive performance in early childhood development.
Area of Science:
- Child Psychology
- Educational Psychology
- Cognitive Development
Background:
- Understanding factors influencing cognitive performance in children is crucial.
- The role of reinforcement in learning and testing is a key area of study.
- Previous research suggests external motivators can impact task engagement.
Purpose of the Study:
- To investigate the effect of a tangible reinforcer (candy) on intelligence test scores.
- To determine if positive reinforcement for correct responses alters IQ scores in young children.
- To compare the outcomes of intelligence testing with and without candy reinforcement.
Main Methods:
- Matched pairs of 5- to 7-year-old children were used, controlling for age, sex, and baseline IQ.
- A control group received the revised Stanford-Binet Scale Form M as per the manual.
- An experimental group received the same test, but with M&M candy as a reward for correct responses.
Main Results:
- A statistically significant difference in IQ test scores was observed between the two groups.
- Children who received candy reinforcement achieved higher scores compared to the control group.
- The positive reinforcement demonstrated an appreciable effect on test performance.
Conclusions:
- Tangible rewards, such as candy, can significantly enhance intelligence test scores in young children.
- Positive reinforcement may be a valuable tool for improving engagement and performance in cognitive assessments.
- Further research could explore the long-term effects and generalizability of this reinforcement strategy.
Abstract:
This experiment studied the effect on intelligence test scores of a probable reinforcer given for correct responses. Eleven pairs of 5- to 7-yr-old children were matched on the basis of a strong liking of candy, no physical problems associated with eating it, parent permission to receive and eat the candy, age, sex, and a revised Stanford-Binet Scale Form L IQ score. The control group was given the revised Stanford-Binet Scale Form M, as prescribed in the test manual. The experimental group was also given Form M according to the manual, except M&M candy was given for each plus or correct response. There was an appreciable, statistically significant difference between the resulting IQ test scores of the two groups.
Related Concept Videos
Behaviorism
The core premise of behaviorism is its focus on observable behavior rather than internal thoughts or feelings. This approach argues that true scientific...
Reinforcement Schedules
Once a behavior is learned,...
Reinforcement
Positive reinforcement occurs when a behavior is followed by the presentation of a rewarding stimulus, increasing the frequency of that behavior. For example:
Primary and Secondary Reinforcers
Effective reinforcers for humans vary depending on the individual and the context. Primary reinforcers, such as food, water, sleep, shelter, and pleasure, have inherent value and satisfy basic biological...
Timing and Consequences on Behavior
Humans, however, can respond to delayed reinforcers. We often make decisions between immediate small rewards and delayed larger rewards. This ability to delay gratification is a significant factor...
Operant Conditioning Intervention
In operant conditioning, behaviors that are...

