The minimal stimulus intensity an organism can perceive is designated as the_______threshold.
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Answer: D. Absolute
Explanation
The absolute threshold is defined as the minimum intensity of a stimulus that an organism can reliably detect. Sensory psychologists measure this boundary point where a stimulus transitions from imperceptible to detectable. Below this threshold level, sensory receptors fail to register sufficient energy to trigger conscious awareness. Gustav Fechner pioneered psychophysics methods to measure human sensory thresholds and perception limits. Absolute thresholds are typically established when a participant detects a stimulus fifty percent of the time. Sensory adaptation can temporarily shift absolute thresholds depending on background environmental stimulation levels.
Audiologists test human absolute thresholds for various sound frequencies during routine hearing examinations. Marketing researchers study sensory thresholds to determine optimal packaging designs and product branding visibility. Understanding absolute thresholds helps engineers design safety alarms that humans can reliably hear or see. Difference threshold refers to the minimum measurable change required to notice a difference between two stimuli. Theoretical is a general descriptive term rather than a standard psychophysical threshold measurement category. Obtained is not a standard psychological term used to classify basic sensory detection thresholds.
- Subject
- Psychology
- Category
- Psychology
- Topic
- —
- Difficulty
- medium
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