Question

For each study, find the Scale of measurement of IV & DV based on a NOIR

A team of cognitive psychologists conducted a study on the effects  of sleep deprivation on short-term memory decay. Forty-eight subjects stayed in a lab for two days. Twenty-four of the subjects are randomly assigned to a condition in which they are not permitted to sleep during that period. The other twenty-four are allowed to sleep whenever they want. At the end of the two days, the subjects complete a task that involves reading a list of 20 words, then recalling as many words as possible.

A researcher examined the effect of different kinds of music on general math ability. Forty-eight subjects were randomly assigned to do a series of math tasks under one of three conditions: 16 while listening to soft gentle music, 16 while listening to loud intense music, and 16 while in silence. The math quiz contained arithmetic, geometry, and word problems. There were 25 items that were 2 points each.

A study was designed to test the effects of science fiction movies on participants' belief in the

supernatural. A scale was designed to measure the degree that a subject believes in the supernatural

on a 1-7 Likert Scale (high scores indicate high levels of belief). Fifty-seven subjects, selected via random

digit dialing (RDD) responded to the scale before and after watching Return of the Jedi, a popular science fiction movie.

Answer 1

1 )

2)

Please rate

Answer 2

Study 1: Effects of sleep deprivation on short-term memory decay

• Independent Variable (IV): Sleep condition (Sleep deprivation vs. Allowed to sleep)

• Scale of measurement: Nominal

• Dependent Variable (DV): Number of recalled words

• Scale of measurement: Ratio

Study 2: Effects of different kinds of music on general math ability

• Independent Variable (IV): Music condition (Soft gentle music, Loud intense music, Silence)

• Scale of measurement: Nominal

• Dependent Variable (DV): Math quiz scores

• Scale of measurement: Ratio

Study 3: Effects of science fiction movies on participants' belief in the supernatural

• Independent Variable (IV): Watching Return of the Jedi (Before vs. After)

• Scale of measurement: Nominal

• Dependent Variable (DV): Degree of belief in the supernatural (Measured on a 1-7 Likert Scale)

• Scale of measurement: Ordinal