Perception - Pose Method - Dr. Nicholas Romanov

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need go through process from stimulus to sensation and lastly comes to response. Sensation is not directly observable and must be inferred from the stimulus-response relationship. This is the fundamental problem of psychophysics and psychology in general. Psychophysical methods attempt to elicit specific sensations by controlling precisely the stimulus and to keep the link between sensation and response as simple as possible by asking very simple questions to address the issue. Psychophysics marked the transition of psychology form a philosophical (introspective method) to a scientific discipline (experimental method). Psychophysical methods continue to be extremely useful to measure perception. It’s have been extended to many different mental phenomena besides measuring sensations.

Last but not least , perception can be measured through direct measures and indirect measures. The terms direct and indirect measures should refer only to characteristics of experiment tasks. More formally, discriminations among a set of alternative stimulus states should be considered a direct measure of perception. For example, consider two possible tasks that measures whether or not the words in compound colour-word stimuli are perceived. If subjects are instructed to identify which word from a known set of the words was presented, then performance on this task would constitute a direct measure of perception, as the instructions explicitly require word identification. However, if subjects are instructed to identify the colours, then any effect that the words may have on colour naming performance would constitute an indirect measure of word perception, since the subjects are not instructed to respond to the identity of the words. A critical aspect of the proposed assumption concerning the relative sensitivity of direct and indirect measures to conscious perceptual experience is the assertion that the sensitivity to both indexes should be measured under comparable experiment conditions. Four measure comparisons are made within perception between the sensitivity direct and indirect measure. It’s divided into perceptual sensitivity versus response bias, stimulus states, task context and response matrix.