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What is the Absolute Difference in the context of Signal Detection Theory?
What is the Absolute Difference in the context of Signal Detection Theory?
- The threshold at which a stimulus is considered supra-threshold
- The minimum change in stimulation needed for perception (correct)
- The change in response bins based on participant expectations
- The maximum change in stimulation needed for perception
How is a Correct Rejection defined in the context of Signal Detection Theory?
How is a Correct Rejection defined in the context of Signal Detection Theory?
- Participant incorrectly identifies the stimulus as present
- Participant incorrectly identifies the stimulus as absent
- Participant correctly identifies the stimulus as present
- Participant correctly identifies the stimulus as absent (correct)
In Signal Detection Theory, what does a False Alarm (FA) represent?
In Signal Detection Theory, what does a False Alarm (FA) represent?
- Participant incorrectly identifies the stimulus as present (correct)
- Participant correctly identifies the stimulus as absent
- Participant incorrectly identifies the stimulus as absent
- Participant correctly identifies the stimulus as present
What does a Miss represent in Signal Detection Theory?
What does a Miss represent in Signal Detection Theory?
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How do scientists use Signal Detection Theory to account for Response Bins (participant expectations)?
How do scientists use Signal Detection Theory to account for Response Bins (participant expectations)?
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What characterizes Subliminal stimuli in the context of Signal Detection Theory?
What characterizes Subliminal stimuli in the context of Signal Detection Theory?
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Study Notes
Absolute Difference
- Represents the difference in intensity between the signal and the noise.
Correct Rejection
- Occurs when the participant correctly identifies that a signal is not present.
- The participant reports they did not detect a signal, and a signal was indeed absent.
False Alarm (FA)
- Occurs when the participant incorrectly identifies that a signal is present.
- The participant reports they detected a signal, but a signal was actually absent.
Miss
- Occurs when the participant fails to detect a signal that is actually present.
- The participant reports they did not detect a signal, but a signal was present.
Response Bins
- Signal Detection Theory allows scientists to account for differences in participant expectations (response bins) using a criterion.
- This criterion represents an internal threshold used by the participant for deciding whether a signal is present.
- Participants with a high criterion require stronger evidence (higher intensity) to report a signal.
- Participants with a low criterion, are more willing to report a signal, even if it is weak.
- The participant's criterion can be influenced by the frequency of expected events, and external factors such as reward and punishment.
Subliminal Stimuli
- Subliminal stimuli fall below the threshold of conscious awareness.
- These stimuli can still elicit a response, however, the participant is unaware of this influence.
- The participant can still exhibit a change in behaviour due to the influence of subliminal stimuli.
- Subliminal stimuli are measured by assessing their ability to influence a participant's choices and biases.
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