OBJECTIVES To assess whether a true knowledge of crowding alters treatment decisions compared with estimates of crowding. MATERIALS AND METHODS Thirty-six orthodontists were asked to estimate crowding using visualization on eight mandibular arch study models and to indicate possible extraction choices. For each model, the intermolar widths, intercanine widths, and clinical scenarios were iden...

Views of natural scenes unfold over time, and objects of interest that were present a moment ago tend to remain present. While visual crowding places a fundamental limit on object recognition in cluttered scenes, most studies of crowding have suffered from the limitation that they typically involved static scenes. The role of temporal continuity in crowding has therefore been unaddressed. We in...

Masking and crowding are major phenomena associated with contextual modulations, but the relationship between them remains unclear. We have recently shown that crowding is apparent in the fovea when the time available for processing is limited, pointing to the strong relationship between crowding in the spatial and temporal domains. Models of crowding emphasize the size (acuity) of the target a...

Perception of peripherally viewed shapes is impaired when surrounded by similar shapes. This phenomenon is commonly referred to as "crowding". Although studied extensively for perception of characters (mainly letters) and, to a lesser extent, for orientation, little is known about whether and how crowding affects perception of other features. Nevertheless, current crowding models suggest that t...

Peripheral vision is characterized in part by poor spatial resolution and impaired visual performance, particularly when the object is surrounded by flanking elements, a phenomenon popularly known as "crowding". Crowding scales with eccentricity irrespective of the target size, both in terms of magnitude and spatial extent, which is determined by varying the target-flanker separation. However, ...

this study investigated cross-cultural differences in the privacy regulation and perception of crowding amongtwo iranian sub-cultures (kurdish and northern women).the primary purpose of this study was to examine whether northern and kurdish women differed in their desired and achieved levels of privacy in parks. the second purpose of this study was to investigate the relationships between the d...

this study investigated cross-cultural differences in the privacy regulation and perception of crowding amongtwo iranian sub-cultures (kurdish and northern women).the primary purpose of this study was to examine whether northern and kurdish women differed in their desired and achieved levels of privacy in parks. the second purpose of this study was to investigate the relationships between the d...

Objective We investigated the suitability of intraoral-scan models for measuring tooth dimensions and the amount of crowding in patients with severe tooth crowding. Materials and Methods Fifty-eight patients who had undergone intraoral scans for diagnosis were included. Cast models were divided into two groups depending on the amount of crowding, as determined by initial caliper-based measure...

Peripheral vision is strongly limited by crowding: Targets that are easily recognized in isolation are unrecognizable when flanked by close-by objects. Crowding does not only impair target recognition but also changes appearance. Here we investigated appearance changes and errors in crowding by letting observers draw crowded stimuli. Observers drew stimuli presented at 6° and 12° eccentricity. ...

the crowding effect is temporally dependent. Second, crowding occurs when a target and its flankers are both presented to one eye (monocular presentation) or when each is presented to a different eye (dichoptic presentation). Thus, crowding may occur at a single stage in the visual system. To test this, we measured the temporal dependence of crowding when the target and flanker stimuli were pre...