Laura Has Developed a New Treatment to Increase Spatial Ability

question 2

Multiple Choice

Laura has developed a new treatment to increase spatial ability. She randomly assigns students to either her intervention or a control condition. In the treatment condition students engage in working puzzles for twenty minutes a day for 10 days. Unfortunately, students do not like her intervention and refuse to do puzzles for all of the days. When she examines post-test means on the spatial ability measure, there are no differences between her treatment and the control condition. Which of the following demonstrates a threat to validity demonstrated in this study?

• A) Maturation
• B) Testing
• C) Instrumentation
• D) Mortality

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Definitions:

Barter

Trading goods and services directly without involving money as an intermediary.

Barter System

An ancient method of exchange where goods and services are directly traded for other goods and services without using money.

Good

A material item that can be touched, used, or consumed, which is produced to fulfill wants or needs.

Service

A type of economic activity that is intangible, is not stored, and does not result in ownership; services are produced and consumed at the same time.