In a Now Classic Study by Simons and Chabris (1999)

question 359

Multiple Choice

In a now classic study by Simons and Chabris (1999) , participants watched two teams pass a basketball to their teammates. One team was wearing white shirts and the other team was wearing black shirts. Participants were told to count how many times the team wearing the white shirts passed the basketball, thereby directing their attention to the white shirts and ignoring the black shirts. Interestingly, more than half of the participants failed to notice when a man wearing a black gorilla suit walked right past the two teams. This phenomenon is known as:

• A) inattentional blindness.
• B) change blindness.
• C) the cocktail party effect.
• D) mindfulness.

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Definitions:

Z-test

A statistical analysis designed to identify variations between the means of two distinct populations, provided that the variances are predetermined and the size of the sample is substantial.

T-test

A statistical test used to compare the means of two groups or to compare a sample mean to a known value when variances are known or assumed to be equal.

Population Variances

Population variances measure the variability or spread of a population's data points from its mean, indicating how much the population data values differ from each other.

Ratio

A measure that compares two quantities by division.