Senses - sensory impressions
The previously mentioned are the so-called sensory impressionsthat must have the appropriate intensity to be received. In order for the stimulus to evoke an impression, it should have an intensity consistent with the so-called absolute threshold, which differs between organisms of different species (e.g. in a cat and a human, the threshold of sensitivity to sounds will be different; see Szewczyk, 2002). The threshold of sensitivity, from which the stimulus can be obtained, is called the differencethreshold. It is worth noting that it is different in different people and additionally is prone to change influenced by various factors in the same person. This is the case, for example, when sensory adaptationoccurs, during which sensitivity to the stimulus decreases, and thus the thresholds of stimulus reception increase. Possible is also the instance of a reverse situation, e.g. a tired person will receive less intensive stimuli.