Researchers Show Participants One of Several Short Films That Vary

question 15

Multiple Choice

Researchers show participants one of several short films that vary in the extent to which they provoke anger,and they measure the heart rates of each participant immediately after each film.This research method is best described as a(n)

• A) series of case studies.
• B) unsystematic observation.
• C) controlled observation.
• D) naturalistic observation.

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Definitions:

Kruskal-Wallis Test

A nonparametric statistical test used to determine if there are statistically significant differences between three or more groups of an independent variable on a continuous or ordinal dependent variable.

Friedman Test

A non-parametric statistical test used to detect differences in treatments across multiple test attempts.

Randomized Block Experiment

An experimental design in which subjects are divided into blocks or groups that are similar, and then within each block, subjects are randomly assigned to treatment conditions.

Rejection Region

In hypothesis testing, the set of values that leads to the rejection of the null hypothesis in favor of the alternative hypothesis.