A Psychologist Wishes to Determine Whether Short-Term Memory Scores Are

question 25

Multiple Choice

A psychologist wishes to determine whether short-term memory scores are affected by the type of medication in hyperactive children. Sixty hyperactive children (30 boys and 30 girls) were randomly assigned to receive either Cylert or Ritalin (two kinds of amphetamines that are central nervous system stimulants) . Their short-term memory was tested on a 20-point scale (where 0 = no memory and 20 = perfect memory) . $\begin{array} { c c c c c c } \hline & \text { Boys } & && { \text { Girls } } \\\hline \text { Cylert } & \text { Placebo } & \text { Ritalin } & \text { Cylert } & \text { Placebo } & \text { Ritalin } \\\hline 12 & 5 & 3 & 5 & 4 & 12 \\10 & 6 & 2 & 6 & 6 & 9 \\13 & 7 & 5 & 2 & 7 & 14 \\10 & 6 & 6 & 4 & 6 & 13 \\9 & 4 & 1 & 3 & 5 & 9 \\12 & 5 & 4 & 2 & 4 & 12 \\13 & 6 & 2 & 4 & 5 & 8 \\10 & 7 & 6 & 6 & 6 & 15 \\11 & 5 & 1 & 2 & 7 & 12 \\12 & 7 & 5 & 4 & 7 & 11 \\\hline\end{array}$
-The F value for gender is

• A)0.16
• B)7.77
• C)112.92
• D)0.42

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Definitions:

Potential

Refers to the potential energy per unit charge at a point in a field or circuit, often associated with voltage or electric potential difference.

Coulomb

The standard unit of electric charge in the International System of Units (SI), equivalent to the charge transported by a constant current of one ampere in one second.

Joule

A unit of energy in the International System of Units (SI), equal to the energy transferred to an object when a force of one newton acts on it in the direction of its motion through a distance of one meter.

Amperes

A unit of electric current in the International System of Units (SI), representing the flow of one coulomb of electricity per second.