In an experiment, an error in a researcher\'s code for presenting stimuli in a c

Question

In an experiment, an error in a researcher's code for presenting stimuli in a certain way on a computer screen causes a change in the way the stimuli are presented. Which threat to internal validity is this?

a. Demand Characteristic

b. Testing Threat

c.Instrumentation Threat

d.Maturation Threat

In an experiment on social anxiety, it was discovered that a treatment group was accidentally left in a loud, overcrowded waiting room. This did not happen to the control group or any other treatment groups. Which threat to internal validity is this?

a.Maturation Threat

b.History Threat

c.Instrumentation Threat

d.Attrition Threat

Explanation / Answer

1. Option C)

internal validity is the accuracy with which the test is conducted, avoiding the effect of confounds. The way stimuli are presented on screen interferes with the results and is a threat to validity.

Instrumentation Threat, when test results are effected by the changes in instrument.

Maturation threat occurs when changes occur in subjects.

Testing Threat occurs when test is compromised when repeated testing leads to learning or practice.

demand characteristics is when test takers interpret the purpose of the test and modify their response accordingly.

2.Option B)

history threat occurs when factors outside tge subject and thevstudy effect the results.

attrition threat occurs when subjects under study leave it before completion, threat occurs when subjects in one group drop out more than the other.

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