What is a feature detector, and what evidence do we have for feature detectors?
What will be an ideal response?
A feature detector is a neuron in the visual system that responds selectively in the presence of a particular visual feature, such as a line or an angle. One type of evidence of this is that researchers recorded from the visual cortex of cats and monkeys and found neurons that responded only when in the presence of lines and so forth. A second type is that people who have viewed a particular stimulus (such as narrow lines) for a minute or so become more sensitive to other stimuli (such as wider lines), implying that feature detectors for the first stimulus had become fatigued.
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Individual diagnosed with schizoaffective disorder might be considered to have:
A. Both schizophrenia and a depressive disorder B. Only the negative symptoms of schizophrenia plus a mood disorder C. A nonpsychotic mood disorder D. A brief psychotic disorder
The psychological effect of cigarette smoking is
A. arousal and activation-a mild stimulant effect. B. calm and relaxation-a mild antianxiety effect. C. altered perception-a mild hallucinogenic effect. D. a combination of A and B.