DU (Delhi University) MA Entrance Applied Psychology: Questions 1 of 300

Appeared in Year: 2018

Question

MCQ▾

A threat to internal validity when groups in a experiment are not equivalent at the beginning of the experiment with regard to the dependent variable is

Choices

Choice (4) Response

a.

Testing effec

b.

Selection bias

c.

Maturation effects

d.

History effects

Answer

b.

Explanation

Selection bias is the selection of individuals, groups, or to obtain data for analysis in a way that proper randomization is not obtained. It is also called a selection effect that refers to the distortion of statistical analysis. If selection bias is not considered, the conclusion of the study can be false. Types of selection bias are systematic error that occurs due to a non-random sampling of a population, which do not include other members. Attrition and observer selection are other types of selection bias. An example of selection bias- if we want to study the effects of working night employees and their effect on certain health problems, the selection of participants should be completely random.

Research Aptitude

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