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Pupil diameter change for four measures as a function of the average time that took to solve each multiplication in Experiment 1.

Pupil diameter change for four measures as a function of the average time that took to solve each multiplication in Experiment 1.

Source publication
Preprint
Full-text available
Several papers by Eckhard Hess from the 1960s and 1970s report that the pupils dilate or constrict according to the interest value, arousing content, or mental demands of visual stimuli. However, Hess mostly used small sample sizes and undocumented luminance control. In a first experiment (N = 182) and a second preregistered experiment (N = 147), w...

Contexts in source publication

Context 1
... to PC [ans-2.5,ans] , Table 5 shows the results for the twelve multiplications for PC max , PC ans , and PC 3 , and Figure 8 show the trends that the four pupil change measures follow as a function of the average time it took to solve each multiplication. It can be seen that the direction of the effect between difficulty and pupil diameter change depends on the measure. ...
Context 2
... D8 (top) shows an example of change value during a slide change, measured with the camera pointed towards the lens (Measurement series 1). Figure D8 (bottom) shows the luminance on a scale from 0% to 100% (Measurement series 3). A slide change lasted on average 1237 ms, of which 646 ms was entirely dark. ...
Context 3
... can be seen that slide changes yielded a 1-s period of darkness (about 650 ms of full darkness and about 200 ms of partial darkness before and after). Figure D8. Change value (%) and luminance (%) and during a slide change. ...
Context 4
... The period between the two gray vertical dotted lines defines the period of full darkness (interval C-D in Figure D8. ...
Context 5
... results showed that the angry face evoked a higher pupil diameter change than the happy face, as depicted in Figure J8. Because we did not have any hypothesis for the faces, no statistical tests are reported. ...
Context 6
... we did not have any hypothesis for the faces, no statistical tests are reported. Figure J8. Mean pupil diameter change (PC t ) for the angry and happy face in Experiment 2 with respect to the preceding control slide. ...
Context 7
... to PC [ans-2.5,ans] , Table 5 shows the results for the twelve multiplications for PC max , PC ans , and PC 3 , and Figure 8 shows the trends that the four pupil change measures follow as a function of the average time it took to solve each multiplication. It can be seen that the direction of the effect between difficulty and pupil diameter change depends on the measure. ...
Context 8
... recordings are available in the Supplementary Material. Figure D8 (top) shows an example of change value during a slide change, measured with the camera pointed towards the lens (Measurement series 1). Figure D8 (bottom) shows the luminance on a scale from 0% to 100% (Measurement series 3). A slide change lasted on average 1237 ms, of which 646 ms was entirely dark. ...
Context 9
... D8 (top) shows an example of change value during a slide change, measured with the camera pointed towards the lens (Measurement series 1). Figure D8 (bottom) shows the luminance on a scale from 0% to 100% (Measurement series 3). A slide change lasted on average 1237 ms, of which 646 ms was entirely dark. ...
Context 10
... can be seen that slide changes yielded a 1-s period of darkness (about 650 ms of full darkness and about 200 ms of partial darkness before and after). Figure D8. Change value (%) and luminance (%) and during a slide change. ...
Context 11
... The period between the two gray vertical dotted lines defines the period of full darkness (interval C-D in Figure D8. ...
Context 12
... our experiment, no hypotheses are associated with the faces; we used the drawings without pupils as an introduction to the study of the schematic eyes. The results showed that the angry face evoked a higher pupil diameter change than the happy face, as depicted in Figure J8. Because we did not have any hypothesis for the faces, no statistical tests are reported. ...
Context 13
... we did not have any hypothesis for the faces, no statistical tests are reported. Figure J8. Mean pupil diameter change (PC t ) for the angry and happy face in Experiment 2 with respect to the preceding control slide. ...

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