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A Researcher Wishes to Test the Effectiveness of a Flu

question 54

Essay

A researcher wishes to test the effectiveness of a flu vaccination. 150 people are vaccinated,
180 people are vaccinated with a placebo, and 100 people are not vaccinated. The number in
each group who later caught the flu was recorded. The results are shown below.  Vaccinated  Placebo  Control  Caught the flu 81921 Did not catch the flu 14216179\begin{array} { r | c c c } & \text { Vaccinated } & \text { Placebo } & \text { Control } \\\hline \text { Caught the flu } & 8 & 19 & 21 \\\text { Did not catch the flu } & 142 & 161 & 79\end{array}


Definitions:

Choice Reaction Time

The time it takes to respond to a stimulus when there are multiple possible responses.

Inspection Time

A measure of sensory processing speed, reflecting the minimum time needed for an individual to make a simple discrimination between stimuli.

Working Memory Capacity

The amount of information that an individual can hold and manipulate in their mind for a short period of time.

Mental Speed

A cognitive ability that refers to how quickly an individual can process information, often measured by tasks requiring rapid decision making.

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