Factors Influencing Experimental Outcomes and Null Effects Quiz

Test your knowledge on factors influencing experimental outcomes, null effects, biases, and statistical concepts in experimental psychology.

#1

Which of the following is NOT a factor influencing experimental outcomes?

Sample size
Researcher bias
Weather conditions
Measurement accuracy
#2

What term refers to the phenomenon where an experimental treatment has no effect?

Placebo effect
Confirmation bias
Null effect
Regression to the mean
#3

Which statistical concept is used to determine if a result is statistically significant?

P-value
Mean
Standard deviation
Regression coefficient
#4

What is the term for the tendency of researchers to find what they expect to find?

Sampling bias
Confirmation bias
Observer bias
Experimenter expectancy effect
#5

What is the term for the phenomenon where participants' behavior changes simply because they are being observed?

Hawthorne effect
Placebo effect
Observer bias
Confirmation bias
#6

Which of the following is a type of control condition used in experiments?

Treatment condition
Random assignment
Placebo condition
Experimenter expectancy
#7

What is the term for the situation where an observed correlation between two variables is actually caused by a third variable?

Causation fallacy
Confounding variable
Correlation coefficient
Extraneous variable
#8

What statistical test is commonly used to compare means between two or more groups in an experiment?

Chi-square test
T-test
ANOVA
Regression analysis
#9

Which of the following is NOT a potential source of bias in experimental research?

Participant expectancy
Social desirability bias
Confirmation bias
Standard deviation
#10

In experimental design, what is the purpose of random assignment?

To eliminate confounding variables
To ensure all groups are identical
To increase statistical power
To control for external factors
#11

Which of the following is NOT a common method to control for participant expectancy effects?

Double-blind procedure
Deception
Placebo manipulation
Demand characteristics
#12

What is the term for the situation where researchers unintentionally influence the outcome of an experiment?

Demand characteristics
Experimenter expectancy
Observer bias
Sampling bias
#13

Which of the following best describes a Type I error in hypothesis testing?

Incorrectly rejecting a true null hypothesis
Failing to reject a false null hypothesis
Correctly rejecting a false null hypothesis
Accepting a false null hypothesis

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