Exhibit 7-12: an Investigator Is Studying the Effect of Two

question 8

Multiple Choice

Exhibit 7-12: An investigator is studying the effect of two physical fitness programs (M and N) on boys and girls.The experimental design is a 2 * 2 factorial design.The results of the investigation might be one of the following four conditions.
$\begin{array}{l}\begin{array}{lll}&\text { Condition (a) }\\&\mathrm{M} & \mathrm{N} \\\text { Boys }&\mathrm{X}=50 & \mathrm{X}=60 \\\text { Girls }&\mathrm{X}=60 & \mathrm{X}=50\end{array}\begin{array}{lll}&\text { Condition (b) }\\&\mathrm{M} & \mathrm{N} \\\text { Boys }&\mathrm{X}=50 & \mathrm{X}=60 \\\text { Girls }&\mathrm{X}=40 & \mathrm{X}=60\end{array}\end{array}$

$\begin{array}{l}\begin{array}{lll}&\text { Condition (c) }\\&\mathrm{M} & \mathrm{N} \\\text { Boys }&\mathrm{X}=50 & \mathrm{X}=40 \\\text { Girls }&\mathrm{Y}=60 & \mathrm{Y}=50\end{array}\begin{array}{lll}&\text { Condition (d) }\\&\mathrm{M} \quad\quad\quad\quad\quad\quad\quad\quad \mathrm{N} \\&\text { None of these condition }\\\\\end{array}\end{array}$

-Refer to Exhibit 7-12.Which condition shows only one possible main effect and no interaction effect?

---

Definitions:

Persistence of Vision

is the phenomenon where an image continues to appear in one's vision after the exposure to the original image has ceased.

Lateral Inhibition

Lateral inhibition is a neurological process that enables the brain to better differentiate stimuli by inhibiting neighboring neurons' activity.

Achromatopsia

A rare, non-progressive inability to perceive color caused by a deficiency in the cones in the retina, leading to seeing the world in shades of gray.

Gate-Control

A theory that suggests the spinal cord contains a neurological "gate" that either blocks pain signals or allows them to continue to the brain.