Exam 2: Research Methodology

In signal detection analysis, a false alarm is an error that occurs when a nonsignal is mistaken for a target signal.

Karwan is a participant in a psychophysical experiment on visual detection.He is shown a mix of near-threshold stimuli with stimulus-absent catch trials.When Karwan indicates that he saw a light in a stimulus-absent catch trial, he is making a ______.

In signal detection theory, an internal cutoff above which the observer makes one response and below which the observer makes another response is known as a ______.

A psychophysical method in which a participant is required to report when or where a stimulus occurs instead of whether it was perceived is known as the ______.

A condition in which incoming light focuses behind the retina, leading to difficulty focusing on close-up objects, common in older adults, in whom the lens becomes less elastic, is known as ______.

The two-point touch threshold is the minimum distance at which two touches are perceived as two touches and not one.

Dr.Kao is developing a technique to screen for malignant tumors.Dr.Kao's technique should ______.

A psychophysical method in which participants judge and assign numerical estimates to the perceived strength of a stimulus is known as ______.

MEG produces better special maps of the brain than fMRI.

Professor Everdine is interested in devising a scale to examine people's perception of saltiness.She asks participants to rate solutions with various amounts of salt dissolved in them on a scale from 0 (not salty at all) to 100 (extremely salty).This method is known as ______.

Karwan is a participant in a psychophysical experiment on visual detection.He is shown a mix of near-threshold stimuli with stimulus-absent catch trials.When Karwan indicates that he did not see a light that was actually present, he is making a ______.

A radiologist screening mammograms to detect breast cancer in a high-risk patient is likely to ______.

What does the Scoville scale measure?

In absolute threshold detection experiments, the crossover point is defined as the point at which ______.

Two observers make different judgments in a signal-detection experiment even though their sensitivity is identical.This may be the result of different criterion.

Why is the Scoville scale considered a psychophysical scale?

Akilah and her team want to develop a scale that rates the bitterness of chocolate.Bitterness is tied to the concentration of cocoa in the chocolate.Explain the test they should run in order to develop the scale.Be sure to explain both the physical and psychological dimensions of the test.

A method whereby an observer controls the level of the stimulus and sets it at the perceptual threshold is known as the method of ______.

Dr.Wong is doing a psychophysical experiment to determine the smallest detectable concentration of coffee.He presents some coffee concentrations that are clearly detectable, others that cannot be detected, and some that are just detectable.These presentations are randomized.What method is Dr.Wong using?

Masking is a difficulty associated with which sense?