Tietz, J.D. – VEMI Lab /vemi 91±¬ΑΟ Wed, 29 Mar 2017 15:07:03 +0000 en-US hourly 1 https://wordpress.org/?v=6.8.5 Learning with virtual verbal displays: Effects of interface fidelity on cognitive map development /vemi/publication/learning-virtual-verbal-displays-effects-interface-fidelity-cognitive-map-development/ Mon, 01 Sep 2008 16:00:51 +0000 /vemi/?post_type=publication&p=1094 Abstract: We investigate verbal learning and cognitive map development of simulated layouts using a non-visual interface called a virtual verbal display (VVD). Previous studies have questioned the efficacy of VVDs in supporting cognitive mapping (Giudice, Bakdash, Legge, & Roy, in revision). Two factors of interface fidelity are investigated which could account for this deficit, spatial language vs. spatialized audio and physical vs. imagined rotation. During training, participants used the VVD (Experiments 1 and 2) or a visual display (Experiment 3) to explore unfamiliar computer-based layouts and seek-out target locations. At test, participants performed a wayfinding task between targets in the corresponding real environment. Results demonstrated that only spatialized audio in the VVD improved wayfinding behavior, yielding almost identical performance as was found in the visual condition. These findings suggest that learning with both modalities led to comparable cognitive maps and demonstrate the importance of incorporating spatial cues in verbal displays.

Citation: Giudice, N.A., & Tietz, J.D. (2008). Learning with virtual verbal displays: Effects of interface fidelity on cognitive map development. In C. Freksa, S. N. Newcombe, P. Gärdenfors & S. Wölfl (Eds.), Spatial cognition VI: Lecture notes in artificial intelligence (Vol. 5248, pp. 121-137). Berlin: Springer.

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]]> An n-back task using vibrotactile stimulation with comparison to an auditory analogue /vemi/publication/n-back-task-using-vibrotactile-stimulation-comparison-auditory-analogue-2/ Mon, 25 Jun 2007 17:34:09 +0000 /vemi/?post_type=publication&p=1259 Abstract:

We report a vibrotactile version of the common n-back task used to study working memory. Subjects wore vibrotactile stimulators on three fingers of one hand, and they responded by pressing a button with the other hand whenever the current finger matched the one stimulated n items back. Experiment 1 showed a steep decline in performance as n increased from 1 to 3; each additional level of n decreased performance by 1.5 d′ units on average. Experiment 2 supported a central capacity locus for the vibrotactile task by showing that it correlated strongly with an auditory analogue; both tasks were also related to standard digit span. The vibrotactile version of n-back may be particularly useful in dual-task contexts. It allows the assessment of cognitive capacity in sensory-impaired populations in which touch remains intact, and it may find use in brain-imaging studies in which vibrotactile stimuli impose a memory load.

Citation:

Klatzky, R.L., Giudice, N.A., Tietz, J., Marston, J.R., Golledge, R.G., & Loomis, J.M. (2007). An n-back task using vibrotactile stimulation with comparison to an auditory analogue. Behavior Research Methods. 40(1), 367-372.

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