#1
What is the purpose of random assignment in experimental research?
To ensure that participants have an equal chance of being assigned to any experimental condition
ExplanationMinimizes selection bias by randomly assigning participants to different experimental conditions.
#2
What is the role of informed consent in psychological research?
To ensure that participants are informed about the purpose, procedures, and risks involved in the study
ExplanationProtects participants' rights by providing them with comprehensive information and obtaining their voluntary agreement.
#3
What is the purpose of a correlation coefficient in statistics?
To measure the strength and direction of the relationship between two variables
ExplanationQuantifies the degree and direction of linear association between two variables.
#4
What is the standard deviation?
The square root of the variance
ExplanationA measure of the amount of variation or dispersion in a set of values; the square root of the variance.
#5
What is the purpose of a control group in experimental research?
To provide a baseline for comparison with the experimental group
ExplanationServes as a reference group to assess the impact of the experimental manipulation.
#6
Which statistical test is appropriate for comparing means of two independent groups?
Independent t-test
ExplanationUsed to determine if there is a significant difference between the means of two independent groups.
#7
What does p-value signify in hypothesis testing?
Probability of observing the sample data given that the null hypothesis is true
ExplanationA measure indicating the strength of evidence against the null hypothesis; lower values suggest stronger evidence.
#8
What is a confounding variable in research?
A variable that influences both the independent and dependent variables
ExplanationAn extraneous variable that may affect the study's outcome, leading to misinterpretation of results.
#9
What is a factorial design in experimental research?
A design that examines the effects of two or more independent variables simultaneously
ExplanationInvestigates the combined effects of multiple independent variables on the dependent variable.
#10
What is the purpose of the Institutional Review Board (IRB) in psychological research?
To review and approve research proposals to ensure ethical standards are met
ExplanationProtects participants by ensuring research adheres to ethical guidelines and standards.