#1
Which of the following is a fundamental principle of measurement?
Accuracy
ExplanationPrecision is the closeness of measurements to each other, accuracy is the closeness to the true value
#2
What is the purpose of blinding in an experiment?
To prevent bias in the results
ExplanationPreventing bias in results
#3
What is the difference between internal and external validity in experimental design?
Internal validity refers to the consistency within the experiment, external validity refers to the generalizability of results
ExplanationDifference between consistency and generalizability
#4
What is the purpose of a cross-sectional study in research?
To collect data from a single point in time for a specific group
ExplanationCollecting data at a single point for a specific group
#5
In experimental research, what is a crossover design?
A design where participants serve as their own controls in different conditions
ExplanationParticipants serving as their own controls
#6
What does the term 'reliability' refer to in the context of experimental design?
Consistency and stability of measurement
ExplanationConsistency and stability of measurement
#7
In a controlled experiment, what is the purpose of a control group?
To serve as a baseline for comparison
ExplanationTo serve as a baseline for comparison
#8
What is the significance of a p-value in statistical analysis?
It assesses the strength of evidence against a null hypothesis
ExplanationAssessing evidence against null hypothesis
#9
In experimental design, what does the term 'randomization' mean?
Random assignment of participants to groups
ExplanationRandom assignment to groups
#10
What is the purpose of a placebo in a controlled experiment?
To prevent bias in the results
ExplanationPreventing bias in results
#11
What is the difference between precision and accuracy in measurement?
Precision is the closeness of measurements to each other, accuracy is the closeness to the true value
ExplanationPrecision vs. accuracy distinction
#12
What is a factorial design in experimental design?
An experimental design involving multiple independent variables
ExplanationDesign with multiple independent variables
#13
What is the purpose of a pilot study in the context of experimental design?
To refine the experimental procedures and identify potential issues
ExplanationRefining procedures and identifying issues
#14
In the context of measurement, what does the term 'validity' refer to?
The extent to which a measurement assesses what it intends to measure
ExplanationExtent of measurement's intended assessment
#15
In statistical analysis, what is the purpose of regression analysis?
To explore relationships between variables and make predictions
ExplanationExploring relationships and making predictions