Another Name for the Threat to Internal Validity Called "Attrition

question 3

Multiple Choice

Another name for the threat to internal validity called "attrition" is

• A) history.
• B) participant loss.
• C) instrumentation.
• D) regression to the mean.

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Definitions:

DL Wage Variance

The difference between the budgeted wage and the actual wage paid to direct labor employees.

DL Efficiency Variance

The difference between the actual hours worked by direct labor to produce goods and the expected (or standard) hours, multiplied by the standard labor rate.

Skilled Engineering Labor

Workforce with specialized technical and engineering skills, vital for designing, implementing, and maintaining complex systems.

Direct Labor Efficiency Variance

A measure that analyses the variance between the actual hours worked and the standard hours set for producing a certain number of units.