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In This Experiment,the Risk-Taking Propensity of 90 Inner City Drug

question 86

Multiple Choice

In this experiment,the risk-taking propensity of 90 inner city drug users was measured using a repeated measures test called the Behavioral Analogue Risk Task (BART;Lejuez et al. ,2002) .The higher the BART score,the higher the risk-taking propensity.Participants also filled out questionnaires so that their Psychopathic Personality Inventory (PPI) scores could be computed.PPI scores are used to detect psychopathic traits in a covert manner and are a common indicator of one's level of psychopathy.The main goal of the experiment was to examine the relationship between risk-taking (measured by BART) based on one's level of psychopathy (measured by PPI on a scale of 0-100) ,gender (1 for male and 2 for female) ,and heroin use (1 for heroin use and 0 for no heroin use) .Below is a partial output of a multiple regression analysis. How many explanatory variables are in this study?

Definitions:

Random Sample

A method of selecting a subset of individuals from a population in which each person has an equal chance of being chosen.

Double-Blind Experiment

An experimental design in which neither the participants nor the experimenters know who is receiving a particular treatment, to prevent bias.

Case Study

A detailed analysis of a person, group, event, or situation over a period of time, used as a research method in psychology and other disciplines.

Correlation

A statistical measure that indicates the extent to which two or more variables fluctuate together.