Exam 13: Evaluating the Methods Sectionprocedures

Random assignment to groups ______ the effects of some threats to validity.

The threat of ______ has been noted to be the most significant issue for single-subject research designs.

The Hawthorne effect and novelty and disruption effects are the same.

All research methods use random assignment.

The definition of a true experimental study requires that a manipulation occur and that there be random assignment to groups.

Discuss instrumentation as a threat to validity.

Discuss pretest sensitization.

Describe the benefits and concerns about random assignment in educational research.

______ validity refers to the extent to which the researchers can replicate the actual events occurring in the natural environment and thus can generalize the results back to the population.

______ type threat to internal validity occurs when the experimental and control groups are selected based on different criteria or when participants are assigned to groups differentially and not by random assignment.

Theoretically, the more control the researchers have over the experimental condition, ______.

Define novelty or disruption effects.

Unlike random selection, random assignment means that all those selected from the population to participate in a study have an equal chance of being assigned to a particular group.

Give a brief description of what the procedures section includes.

______ refers to when the control group is aware they are in a study and make efforts to do better and outperform the experimental group.

Give an example of how maturation may impact a study.

The procedures section is not the section where considerable focus will be in determining the efficacy of the study.

Provide an example of interaction between personological variables and treatment (sample characteristics) as a threat to population validity.

A solution to which threat is to use an unobtrusive measure, so the participants are not aware they are being observed or measured on the dependent variable?

Attrition is also called experimental mortality.