Abstract
The present study provides normative measures for a new stimulus set of images consisting of 225 everyday objects, each depicted both as a photograph and a matched clipart image generated directly from the photograph (450 images total). The clipart images preserve the same scale, shape, orientation, and general color features as the corresponding photographs. Various norms (modal name and verb agreement measures, picture–name agreement, familiarity, visual complexity, and image agreement) were collected separately for each image type and in two different contexts: online (using Mechanical Turk) and in the laboratory. We discuss similarities and differences in the normative measures according to both image type and experimental context. The full set of norms is provided in the supplemental materials.
Highlights
The present study provides normative measures for a new stimulus set of images consisting of 225 everyday objects, each depicted both as a photograph and a matched clipart image generated directly from the photograph (450 images total)
Similar benefits have been observed in studies that have compared more iconic images, such as photographs, with line drawings (e.g., Brodeur, O’Sullivan, & Crone, 2017; Brodie, Wallace, & Sharrat, 1991; Salmon, Matheson, & McMullen, 2014), or even when iconicity has been varied in smaller degrees
Our primary goal was to obtain the relevant norms for the stimulus set, we examined whether the norms varied according to image type and/or experimental context (MTurk vs. in-lab)
Summary
The present study provides normative measures for a new stimulus set of images consisting of 225 everyday objects, each depicted both as a photograph and a matched clipart image generated directly from the photograph (450 images total). To date, normed stimulus sets of object photographs have focused primarily on the comparison of their photographic images with paired black-and-white line drawings or grayscale images (e.g., Brodeur et al, 2017; Moreno-Martínez & Montoro, 2012; O’Sullivan, Lepage, Bouras, Montreuil, & Broduer, 2012). Moreno-Martínez and Montoro compared norms on their new photographic stimulus set with items from other normed photographic sets, as well as the norms from Snodgrass and Vanderwart’s original set of line drawings In this case, the comparisons were based on the match in object type alone, with no control over the objects’ visual characteristics (e.g., contours, coloring, orientation). Matched colored clipartstyle images are not included in this stimulus set or, to our knowledge, in any other existing normed stimulus set that varies the degree of iconicity in images of individual objects
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