When a Researcher Asks the Question, "Have Changes in Some

question 1

Multiple Choice

When a researcher asks the question, "Have changes in some developmental process within the subjects paralleled the treatment effects?", she is concerned with which one of the following potential threats to internal validity?

• A) maturation
• B) subject selection
• C) regression effect
• D) testing effect

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Definitions:

Motion Parallax

Motion Parallax is an optical illusion where objects closer to the observer appear to move faster than objects further away when the observer moves their head or body side-to-side.

Perceptual Constancy

The perceptual phenomenon where the perception of objects remains relatively unchanged under different conditions such as changes in illumination, distance, or perspective.

Figure-ground Distinction

Refers to the visual perception ability to separate objects (figure) from their background (ground), allowing focus on specific elements in a field of perception.

Retinal Disparity

The slight difference in images processed by the left and right eyes, which is important for depth perception.