An Experimenter Studying the Overjustification Effect Wants to Compare the Behaviour

question 31

Multiple Choice

An experimenter studying the overjustification effect wants to compare the behaviour of students who are rewarded for doing an enjoyable task with that of students who are not rewarded. For each student he decides which condition they will be in by flipping a coin. This procedure

• A) ensures that each student has an equal chance of being in either condition.
• B) does not ensure that a random sample of participants will be selected.
• C) helps to rule out initial group differences as a potential cause of the experimental effects.
• D) all of these choices.

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Definitions:

Frequency Distributions

A summary of data showing the number (or frequency) of observations in each category of a variable.

Population Median

The population median is the value that divides the population into two equal halves, with half of the population values being less than the median and the other half being greater.

Population Mean

The average of a set of values in the entire population.

Population Locations

A term not commonly used in statistics in its listed form; may refer to the geographical distribution or spread of a population.