The effects of target size and error rate on the cognitive demand and stress during augmented reality interactions.

This study investigated the effects of target size and error rate on cognitive demand during augmented reality (AR) interactions. In a repeated-measures laboratory study, twenty participants performed two AR tasks (omni-directional pointing and cube placing) with different target sizes and error rates. During the AR tasks, we measured cerebral oxygenation using functional near-infrared spectroscopy (fNIRS), perceived workload using the NASA-TLX questionnaire, stress using the Short Stress State Questionnaire, and task performance (task completion time).

Influence of the wearable posture correction sensor on head and neck posture: Sitting and standing workstations.

Background: Flexed head and neck postures are associated with the development of neck pain in the office environment. There is little evidence regarding whether a wearable posture sensor would improve the head and neck postures of office workers.

Objective: The aim of this study was to evaluate the effect of the wearable posture sensor on the posture and physical demands on the head and neck during office work.

The effect of feedback and practice on the acquisition of novel speech behaviors.

Purpose: This study examined the effect of manipulating several parameters of motor learning theory on participants' phonetic acquisition and retention of utterances in a foreign language (Korean).

Method: Thirty-two native English-speaking participants naïve to the Korean language were each given 10 Korean sentences to practice and learn. The independent variables in the study were the number of practice trials and the feedback schedule.