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Journal of Experimental Psychology Mar 1965
Topics: Depth Perception; Humans; Perception; Size Perception
PubMed: 14271335
DOI: 10.1037/h0021728 -
Journal of Experimental Psychology Sep 1965
Topics: Cues; Depth Perception; Humans; Size Perception
PubMed: 14343257
DOI: 10.1037/h0022211 -
[Report]. Civil Aeromedical Research... Jul 1962
Topics: Humans; Size Perception; Space Perception; Visual Perception
PubMed: 24546782
DOI: No ID Found -
Scientific Reports Dec 2015The size-weight illusion is the phenomenon that the smaller of two equally heavy objects is perceived to be heavier than the larger object when lifted. One explanation...
The size-weight illusion is the phenomenon that the smaller of two equally heavy objects is perceived to be heavier than the larger object when lifted. One explanation for this illusion is that heaviness perception is influenced by our expectations, and larger objects are expected to be heavier than smaller ones because they contain more material. If this would be the entire explanation, the illusion should disappear if we make objects larger while keeping the volume of visible material the same (i.e. objects with visible holes). Here we tested this prediction. Our results show that perceived heaviness decreased with object size regardless of whether objects visibly contained the same volume of material or not. This indicates that object size can influence perceived heaviness, even when it can be seen that differently sized objects contain the same volume of material.
Topics: Female; Humans; Male; Size Perception; Visual Perception; Weight Perception
PubMed: 26626051
DOI: 10.1038/srep17719 -
Vision Research Jul 1996Perceived slant produced by size disparities in random-dot displays was measured by tactile matching. For a 60 deg surface, slant produced by vertical-size disparity...
Perceived slant produced by size disparities in random-dot displays was measured by tactile matching. For a 60 deg surface, slant produced by vertical-size disparity (the induced effect) was opposite to that produced by horizontal-size disparity. Overall-size disparity produced a little slant. With small displays, effects of horizontal and vertical disparities were reduced but not those of overall disparity. A zero-disparity surround increased effects of horizontal and overall disparities but reduced the induced effect. A mixture of horizontally disparate and zero-disparity dots produced two slanted surfaces. Vertically disparate and zero-disparity dots produced one slanted surface. Abutting opposite horizontal disparities produced surfaces with a sharp boundary. Abutting vertical disparities produced surfaces with a gradual boundary. Perceived slant depends on the difference between horizontal-size disparity detected locally and mean vertical-size disparity over a relatively large area.
Topics: Depth Perception; Humans; Male; Pattern Recognition, Visual; Rotation; Size Perception; Vision Disparity; Visual Fields
PubMed: 8759431
DOI: 10.1016/0042-6989(95)00258-8 -
Vision Research 1988A light square against a dark background besides an equisized dark square against a light background shows a difference in apparent size such that the light square seems...
A light square against a dark background besides an equisized dark square against a light background shows a difference in apparent size such that the light square seems larger than the dark one. This illusion was studied for squares of 109 x 109 min arc. Their centres were located 90 min arc out of the centre of the fovea. The apparent size appeared to be dependent on the contrast between the square and the background and not on the mean luminance in the vicinity of the contour. The addition of a small white or dark line to the luminance step that constituted the border of the square changed the illusion dramatically. It is argued that this explains the observations where an inversion of the illusion for very small contrast values was found. The results are explained on the basis of a model with receptive fields of different sizes overlapping the same retinal location and having different sensitivities.
Topics: Fixation, Ocular; Humans; Illusions; Light; Motion Perception; Optical Illusions; Retina; Size Perception
PubMed: 3188404
DOI: 10.1016/0042-6989(88)90183-6 -
Journal of Experimental Psychology.... Sep 2014Previous research has shown that people exhibit a sample size bias when judging the average of a set of stimuli on a single dimension. The more stimuli there are in the...
Previous research has shown that people exhibit a sample size bias when judging the average of a set of stimuli on a single dimension. The more stimuli there are in the set, the greater people judge the average to be. This effect has been demonstrated reliably for judgments of the average likelihood that groups of people will experience negative, positive, and neutral events (Price, 2001; Price, Smith, & Lench, 2006) and also for estimates of the mean of sets of numbers (Smith & Price, 2010). The present research focuses on whether this effect is observed for judgments of average on a perceptual dimension. In 5 experiments we show that people's judgments of the average size of the squares in a set increase as the number of squares in the set increases. This effect occurs regardless of whether the squares in each set are presented simultaneously or sequentially; whether the squares in each set are different sizes or all the same size; and whether the response is a rating of size, an estimate of area, or a comparative judgment. These results are consistent with a priming account of the sample size bias, in which the sample size activates a representation of magnitude that directly biases the judgment of average.
Topics: Attention; Female; Humans; Judgment; Male; Photic Stimulation; Probability; Sample Size; Size Perception
PubMed: 24749965
DOI: 10.1037/a0036576 -
Perceptual and Motor Skills Feb 1963
Topics: Humans; Size Perception
PubMed: 14023602
DOI: 10.2466/pms.1963.16.1.235 -
Journal of Vision Mar 2020While visual size preferences regarding still objects have been investigated and linked to the "canonical size" effect-where preferred on-screen size was significantly...
While visual size preferences regarding still objects have been investigated and linked to the "canonical size" effect-where preferred on-screen size was significantly related to objects' real-world size-the visual size preferences related to moving images of natural scenes has not been researched. In this study, we measured the preferred size of moving images of natural scenes and short duration and investigated the effect of viewing distance on size preferences. Our results showed that the preferred size varied strongly depending on content, and we found moving images' canonical size effect. The preferred size in images of scenery was significantly larger than in images of persons, and there was a positive correlation between the preferred size and the real-world physical size of the main subjects in the images. When the viewing distance was doubled, the preferred size increased about 10% as a ratio to screen size-in contrast to the findings of a previous study. While the rationale for these findings is not yet clear, our analysis suggests that neither the motion component in the images nor the nature of their background area are contributing factors. We suggest that environment, viewing distance, and screen size may contribute to this effect.
Topics: Adult; Distance Perception; Female; Humans; Male; Middle Aged; Motion Perception; Psychophysics; Size Perception; Young Adult
PubMed: 32207770
DOI: 10.1167/jov.20.3.6 -
Attention, Perception & Psychophysics May 2020We recently showed that motion dynamics greatly enhance the magnitude of certain size contrast illusions, such as the Ebbinghaus and Delboeuf illusions. Here, we extend...
We recently showed that motion dynamics greatly enhance the magnitude of certain size contrast illusions, such as the Ebbinghaus and Delboeuf illusions. Here, we extend our study of the effect of motion dynamics on size illusions through a novel dynamic corridor illusion, in which a single target translates along a corridor background. Across three psychophysical experiments, we quantify the effects of stimulus dynamics on the Ebbinghaus and corridor illusions across different viewing conditions. The results revealed that stimulus dynamics had opposite effects on these different classes of size illusions. Whereas dynamic motion enhanced the magnitude of the Ebbinghaus illusion, it attenuated the magnitude the corridor illusion. Our results highlight precision-driven weighting of visual cues by neural circuits computing perceived object size. This hypothesis is consistent with observations beyond size perception and may represent a more general principle of cue integration in the visual system.
Topics: Adult; Cues; Female; Humans; Male; Motion Perception; Optical Illusions; Photic Stimulation; Psychophysics; Random Allocation; Size Perception; Young Adult
PubMed: 31898067
DOI: 10.3758/s13414-019-01927-w