Experimental Design and Validity in Psychology Quiz

Random assignment ensures equal distribution of participant characteristics across experimental conditions, reducing confounding variables.

A control group establishes a baseline for comparison, helping to isolate and identify the impact of the independent variable.

Blinding prevents participant awareness of their experimental condition, reducing bias and enhancing the internal validity of the study.

Pilot studies assess the practicality and potential problems of study procedures, helping researchers refine their methods before conducting the main study.

A manipulation check assesses whether the intended changes in the independent variable were successfully implemented, ensuring the validity of the experimental manipulation.

Quasi-experimental designs lack random assignment and often use existing groups, limiting causal inferences.

Internal validity ensures that observed effects can be attributed to the independent variable, minimizing alternative explanations.

Convenience sampling may lead to biased samples, compromising the external validity and generalizability of study results.

Demand characteristics arise when participants modify their behavior based on perceived expectations, potentially confounding study results.

Participant expectancy occurs when participants anticipate and respond based on perceived expectations, influencing study outcomes and compromising internal validity.

Factorial designs involve manipulating multiple independent variables simultaneously, allowing the examination of their individual and interactive effects.

Selection bias occurs when non-random assignment leads to unequal participant characteristics, confounding the interpretation of results.

Experimenter bias occurs when researchers, knowingly or unknowingly, influence participants or data collection, compromising objectivity.

Correlational designs examine relationships between variables but lack manipulation of an independent variable, distinguishing them from experimental designs.

External validity assesses the extent to which study findings can be applied beyond the specific experimental conditions to broader contexts or populations.

Debriefing provides participants with information about the study's objectives, procedures, and any deception used, promoting ethical conduct and addressing potential concerns.

Between-subjects designs involve different groups of participants experiencing different experimental conditions, allowing for comparisons between groups.