Principles of Experimental Design in Psychology Quiz

Random assignment ensures unbiased group allocation.

Debriefing ensures participants understand the study's purpose and have the opportunity to ask questions.

Random assignment helps minimize participant differences across experimental groups.

Regression to the mean is a statistical phenomenon, not a threat to internal validity.

A control group establishes a baseline against which the experimental group is compared.

Blinding prevents participant and researcher biases by keeping them unaware of the assigned conditions.

Correlational design does not involve manipulation of variables, unlike experimental designs.

Counterbalancing ensures that the order of presenting experimental conditions doesn't affect the results.

Within-subjects design utilizes the same participants for all conditions, reducing the need for a large sample size.

Pilot testing helps identify and address potential issues with experimental procedures and materials.

Informed consent ensures participants understand the study's purpose, procedures, risks, and benefits before agreeing to participate.

Single-blind studies may introduce bias as researchers, though unaware of participant conditions, may inadvertently influence outcomes.

A placebo group helps distinguish between the actual treatment effects and participants' expectations or biases.

A manipulation check ensures that the manipulation of the independent variable indeed influences the dependent variable as intended.

True experimental designs employ random assignment to ensure unbiased group allocation.

Placebos help differentiate between the actual treatment effects and psychological responses induced by the belief in treatment.

External validity assesses the generalizability of study findings beyond the current context.

Factorial design involves manipulating more than one independent variable simultaneously.

Factorial designs may fail to account for interactions between manipulated variables.

Main effects compare overall differences between groups, while interactions examine how one variable's effect changes depending on another.

Quasi-experimental designs lack full control over independent variables compared to experimental designs.

Experimental designs involve deliberate manipulation of variables, unlike non-experimental designs.

Convenience sampling may lead to biased results as it relies on easily accessible participants rather than a representative sample.

Extraneous variables are uncontrolled factors that may unintentionally influence the study's outcomes.

Replication validates the reliability of study findings by reproducing the results under similar conditions.