Michael Baxter

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Two experiments evaluated the ability of 50 older, middle-aged, and younger adults to discriminate the 3-dimensional (3-D) shape of curved surfaces defined by optical motion. In Experiment 1, temporal correspondence was disrupted by limiting the lifetimes of the moving surface points. In order to discriminate 3-D surface shape reliably, the younger and(More)
Two experiments evaluated the ability of 30 older and younger adults to discriminate the curvature of simple object surfaces from static and dynamic touch. The ages of the older adults ranged from 66 to 85 years, while those of the younger adults ranged from 20 to 29 years. For each participant in both experiments, the minimum curvature magnitude needed to(More)
The ability of 114 younger and older adults to recognize naturally-shaped objects was evaluated in three experiments. The participants viewed or haptically explored six randomly-chosen bell peppers (Capsicum annuum) in a study session and were later required to judge whether each of twelve bell peppers was "old" (previously presented during the study(More)
Younger (20-25 years of age) and older (61-79 years) adults were evaluated for their ability to visually discriminate length. Almost all experiments that have utilized the method of single stimuli to date have required participants to judge test stimuli relative to a single implicit standard (for a rare exception, see Morgan, On the scaling of size(More)
Little is known about memory for solid (3-D) shape, especially for unfamiliar naturally-shaped objects. In the current Experiment 1, participants haptically explored or viewed a set of six bell peppers (Capsicum annuum) either once, four times, or seven times. On each study trial, the participants either viewed or haptically explored a particular bell(More)
This paper presents the design of a mobile robot which could follow a track and shoots a ball to the target set at the distance in a relay race. The design of the motor control circuit, speedometer, sensors and embedded control system are detailed respectively. Then the control strategy based on light tracking and recognition of barcode is designed, which(More)
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