#1
Which of the following is NOT a characteristic of a good operational definition?
It is based on subjective interpretations.
ExplanationOperational definitions should be objective and measurable.
#2
What is the purpose of a pilot study in experimental research?
To test the feasibility of the study procedures.
ExplanationPilot studies help identify and address potential issues with study procedures before conducting the main experiment.
#3
Which of the following is a measure of central tendency?
Mean
ExplanationMean represents the average value of a dataset and is one of the measures used to describe central tendency.
#4
What is the purpose of a placebo in experimental research?
To provide a baseline for comparison with the experimental treatment.
ExplanationPlacebos help control for the psychological and physiological effects of receiving treatment, allowing researchers to isolate the specific effects of the experimental treatment.
#5
Which of the following is a potential limitation of using deception in psychological research?
It may undermine the trust between researchers and participants.
ExplanationDeception may lead to distrust among participants, potentially impacting the validity of study outcomes and future participation in research.
#6
In an experiment, what does a control group allow researchers to do?
Compare the experimental group to a baseline.
ExplanationControl group provides a reference point for evaluating the effects of the experimental treatment.
#7
Which of the following is a potential drawback of using a convenience sample?
It may introduce bias.
ExplanationConvenience sampling may not represent the entire population and could lead to biased results.
#8
What is the purpose of counterbalancing in experimental design?
To eliminate order effects.
ExplanationCounterbalancing ensures that the effects of different conditions are evenly distributed across participants, reducing the influence of order effects.
#9
What is the difference between reliability and validity in measurement?
Reliability refers to consistency, while validity refers to accuracy.
ExplanationReliability concerns the consistency of measurements over time, while validity relates to whether a measure accurately assesses what it's intended to.
#10
What is the purpose of inferential statistics in psychological research?
To make inferences about population parameters based on sample data.
ExplanationInferential statistics allow researchers to draw conclusions about populations based on data collected from samples.
#11
What is the purpose of random assignment in experimental design?
To ensure that the experimental and control groups are equivalent.
ExplanationRandom assignment minimizes the chance of preexisting differences between groups, increasing the validity of comparisons.
#12
Which of the following is an example of a within-subjects design?
A study comparing the effectiveness of two different teaching methods by testing each student with both methods.
ExplanationWithin-subjects design involves testing the same subjects under different conditions to compare their responses.
#13
Which of the following is a disadvantage of using self-report measures?
They are prone to social desirability bias.
ExplanationSelf-report measures may be influenced by participants' desire to present themselves in a socially desirable manner, potentially skewing responses.
#14
What is a Type I error in hypothesis testing?
Rejecting a true null hypothesis.
ExplanationType I error occurs when a null hypothesis that is actually true is incorrectly rejected.
#15
What is the purpose of statistical power analysis in experimental design?
To estimate the probability of detecting an effect, given its existence.
ExplanationStatistical power analysis helps determine the sample size needed to detect an effect of a certain size with a given level of confidence.