27 research outputs found
Passive Tactile Feedback Facilitates Mental Rotation of Handheld Objects
No full textMental rotation of objects improves when passive tactile information for the rotating object accompanies the imagined rotation (Wraga, Creem, & Proffitt, 2000). We examined this phenomenon further using a within-subjects paradigm involving handheld objects. In Experiment 1, participants imagined rotating an unseen object placed on their upturned palms. The participants were faster at mental rotation when the object was rotated on their palm than when the object remained stationary. Experiment 2 tested whether the performance advantage would endure when the participants received tactile information for only the start- and endpoints of the rotation event. This manipulation did not improve performance, relative to a stationary control. Experiment 3 revealed that ambiguous tactile information, continuous with the rotation event but independent of object shape, actually degraded performance, relative to a stationary control. In Experiment 4, we found that continuous tactile rotation discrepant from imagined object movement also hindered performance, as compared with continuous tactile information aligned with imagined object movement. The findings suggest a tight coupling between tactile information specifying continuous object rotation and the corresponding internal representation of the rotating object. Copyright 2008 Psychonomic Society, Inc
Gender stereotypes in occupational choice: a cross-sectional study on a group of Italian adolescents [Erratum]
No full textRamaci T, Pellerone M, Ledda C, Presti G, Squatrito V, Rapisarda V. Psychol Res Behav Manag. 2017;10:109–117. On page 116, Reference section, an error was introduced in the numbering regarding reference 44. The correct reference details are:44. Wraga M, Duncan L, Jacobs EC, Helt M, Church J. Stereotype susceptibility narrows the gender gap in imagined self-rotation performance. Psychon Bull Rev. 2006;13(5):813–819.The reference citation in the main text is correct.Read the original articl
Wraga, William G., The Inglis Surveys: Social Efficiency Thesis Anomalies, pp. 13-38 in Lynn M. Burlbaw and Sherry L. Field, eds., Explorations in Curriculum History Research. Greenwich, CT: Information Age Publishing, 2005.
No full textReviews the school surveys done by Alexander James Inglis from 1912-1922; characterizes the nature and purpose of this work in relation to the overall survey movement
Wraga, William G., Arresting the Decline in Integrity of Curriculum Studies in the United States, pp. 99-110 in Joao M. Paraskeva and Shirley R. Steinberg, eds., Curriculum: Decanonizing the Field. New York: Peter Lang, 2016.
No full textArgues that the scholarly field of Curriculum Studies has lost its integrity because it has focused on theoretical issues rather than on the needs of its constituents to enhance 1) curriculum development and the insights of curriculum practice, 2) the experiences of students, and 3) curriculum policy
Zastosowanie podłoży wzbogaconych w kompost zawierający wycierkę ziemniaczaną w uprawie piątaka lancetowatego (Pentas lanceolata (Forssk.) Deflers)
No full textTwo experiments were carried out in the years 2005-2006 to examine if media supplemented with 20, 40 or 60 % compost containing 70 % potato pulp and 30 % rye straw can be used in cultivation of three cultivars of Pentas lanceolata. In the first experiment compost after 7 months of composting process was used and in the second experiment compost after 19 months of composting process was used. It was found that mixtures of 20 % compost and 80 % sphagnum peat can be recommended for Egyptian star cluster cultivation. Plants cultivated in such media were healthy, well-formed and blossomed abundantly. Media containing 40 and 60 % compost were characterized by too high macroelements content and by too salinity. Plants cultivated in such media were small and blossomed poorly.W latach 2005-2006 przeprowadzono dwa doświadczenia, których celem było zbadanie, czy podłoża z dodatkiem 20, 40 lub 60 % kompostu zawierającego 70 % wycierki ziemniaczanej i 30 % słomy żytniej mogą, być stosowane w uprawie trzech odmian piątaka lancetowatego. W doświadczeniu I zastosowano kompost po 7 miesiącach kompostowania, a w doświadczeniu II kompost po 19 miesiącach kompostowania
Implicit transfer of motor strategies in mental rotation
No full textRecent research indicates that motor areas are activated in some types of mental rotation. Many of these studies have required participants to perform egocentric transformations of body parts or whole bodies; however, motor activation also has been found with nonbody objects when participants explicitly relate the objects to their hands. The current study used positron emission tomography (PET) to examine whether such egocentric motor strategies can be transferred implicitly from one type of mental rotation to another. Two groups of participants were tested. In the Hand-Object group, participants performed imaginal rotations of pictures of hands; following this, they then made similar judgments of pictures of Shepard-Metzler objects. The Object-Object group performed the rotation task for two sets of Shepard-Metzler objects only. When the second condition in each group (which always required rotating Shepard-Metzler objects) was compared, motor areas (Area 6 and M1) were found to be activated only in the Hand-Object group. These findings suggest that motor strategies can be covertly transferred to imaginal transformations of nonbody objects. © 2003 Elsevier Science (USA). All rights reserved
Welcome to Wonderland : the influence of the size and shape of a virtual hand on the perceived size and shape of virtual objects
No full textThe notion of body-based scaling suggests that our body and its action capabilities are used to scale the spatial layout of the environment. Here we present four studies supporting this perspective by showing that the hand acts as a metric which individuals use to scale the apparent sizes of objects in the environment. However to test this, one must be able to manipulate the size and/or dimensions of the perceiver’s hand which is difficult in the real world due to impliability of hand dimensions. To overcome this limitation, we used virtual reality to manipulate dimensions of participants’ fully-tracked, virtual hands to investigate its influence on the perceived size and shape of virtual objects. In a series of experiments, using several measures, we show that individuals’ estimations of the sizes of virtual objects differ depending on the size of their virtual hand in the direction consistent with the body-based scaling hypothesis. Additionally, we found that these effects were specific to participants’ virtual hands rather than another avatar’s hands or a salient familiar-sized object. While these studies provide support for a body-based approach to the scaling of the spatial layout, they also demonstrate the influence of virtual bodies on perception of virtual environments
