When two identical stimuli, such as a pair of clicks, are presented with a sufficiently long time-interval between them they are readily perceived as two separate events. However, as they are presented progressively closer together, there comes a point when the two separate stimuli are perceived as one. This phenomenon applies not only to hearing but also to other sensory modalities. Damage to ...

Infiltration is one of the most important hydraulic parameters affecting surface irrigation and one ofthe most difficult parameters in practical field determinations. The infiltration equations are used todescribe water flow hydraulics and surface irrigation systems design. But determination of theparameters in these equations are costly and time consuming. Therefore, some estimating methods ar...

Gender disparities in wages and attainment caused by employer discrimination can come about by three very different processes: (1) allocative discrimination, in terms of who gets allocated to which jobs, at the point of hire, in subsequent promotion, and dismissal, (2) within-job wage discrimination, the unequal pay for the same work for the same employer, and (3) valuative discrimination, the ...

Background and Aim: The aim of this study was to evaluate the structural integrity of multiple-choice questions according to the Millman checklist, and to assess thedistinguishing power of these questions between weak and strong students in theoretical courses of Periodontics in an academic year (2014-15) in Dental Branch of Tehran Islamic Azad University. Materials and Methods: A total of...

Spatial frequency discrimination could simply reflect the ability to discriminate local differences in width when sinusoidal gratings are used. We introduced random fluctuations in the half-cycle widths of both extended 1c/° gratings and those restricted to 1.5 cycles (i.e. two bars of identical phase), as we hypothesised that discrimination for large gratings would be more robust to this disto...

Stereoscopic depth discrimination was investigated in crossed and uncrossed directions using stimuli defined by binocular disparity differences embedded in dynamic random-dot stereograms. Across three experiments, fixation was directed to a point on the display screen (which placed crossed stimuli in front of and uncrossed stimuli behind, the background dots of the stereogram), to a point in fr...