When Predicting Y from Two Variables Relative to Using Only

question 89

Multiple Choice

When predicting Y from two variables relative to using only one variable, _________.

• A) prediction accuracy always increases
• B) prediction accuracy is dependent on the relationship between the second variable and the Y variable
• C) increase in prediction accuracy depends on the correlation between the two predictor variables
• D) b and c

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Definitions:

One-group Pretest-posttest Design

A research design where a single group of subjects is tested before and after a treatment to observe changes.

Pretest

An assessment given before a main intervention or treatment to establish a baseline measure of the participants' knowledge or skills.

Experimental Manipulation

The deliberate alteration of variables in an experimental setup to study its effects on the outcome.

Participant's Behavior

The actions or reactions of individuals taking part in a study, influenced by experimental conditions or their own characteristics.