Lisa Is Participating in a Psychology Experiment

question 194

Multiple Choice

Lisa is participating in a psychology experiment.She is seated in a dimly lit room and is told to look strait ahead at the blank screen.Lisa's task is to detect points of light as they appear on the screen,and Lisa will be paid $10 for every point of light she correctly detects.Several minutes into the experiment,Lisa is discouraged by how few light points she is seeing,so she changes her strategy and starts focusing off to the side of the screen rather than in the middle of the screen as she had been.Sure enough,by the end of the experiment,Lisa has enough money to buy the pizza for tonight's study group.Lisa's new strategy worked because:

• A)the image then fell on the part of the retina more densely packed with cones.
• B)the image then fell on the part of the retina more densely packed with rods.
• C)the image then fell on the outside of the retina where the cones are denser.
• D)the image then fell on the fovea where the dim light is more easily detected.

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Definitions:

Random Sample

A subset of individuals chosen from a larger set, where each individual is selected randomly and entirely by chance, ensuring that every subset of the population has an equal probability of being chosen.

Females

Individuals of the female sex or gender, characterized biologically by two X chromosomes in mammals.

Expected Value

The long-run average value of repetitions of the same experiment or random trial, indicating the central tendency.

Random Variable

A variable that can take on numerical results from a random event or experiment.