Aaron Anderson studies reaction time by having participants press the space-bar on a keyboard as soon as they notice a specific word flash on a computer screen.Throughout the experiment,Aaron must carry out diagnostics and repairs to keep his equipment in working order because repetitive use makes the keyboard less sensitive and the accumulation of experimental data slows down the computer's processing speed.What threat to internal validity is Aaron contending with?
A)Instrumentation
B)Mortality
C)Maturation
D)Testing effects
E)Diffusion of treatment

Question

Quizplus · Accepted Answer

The threat to internal validity that Aaron is contending with is instrumentation. This is because the sensitivity of the keyboard decreases and the processing speed of the computer slows down during the course of the experiment, potentially leading to inaccurate or inconsistent results.

Aaron Anderson Studies Reaction Time by Having Participants Press the Space-Bar