Kritina L. Holden

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Two experiments examined selecting text using a movement sequence of pointing and dragging. Experiment 1 showed that, in the Point-Drag sequence, the pointing time was related to the pointing distance but not to the width of the text to be selected; in contrast, pointing time was related to both the pointing distance and the width of the text in the(More)
The paper challenges the notion that any Fitts' Law model can be applied generally to human-computer interaction, and proposes instead that applying Fitts' Law requires knowledge of the users' sequence of movements, direction of movement, and typical movement amplitudes as well as target sizes. Two experiments examined a text selection task with sequences(More)
Discriminant function and polynomial regression methods were used to define a mental age function from scale score profile patterns found in the WAIS manual. Values on the mental age function then were calculated from WAIS scale score profiles for 164 alcoholics in the age range 35 to 74. Validity of the mental age function was evident in clear(More)
BACKGROUND The ability to appreciate humour is essential to successful human interactions. In this study, we hypothesized that individuals with schizophrenia would have diminished ability to recognize and appreciate humour. The relationship between humour experience and clinical symptoms, cognitive and social functioning was examined. METHOD Thirty(More)
Computer systems offering windowing environments have been readily embraced by the computer user community. These capabilities have become so popular in recent years, that even the more traditional command-line systems such as IBM PCs are offering windowing environments. The question arises as to whether or not a windowing environment is appropriate for any(More)
A test battery was developed for cursor control device evaluation: four tasks were taken from ISO 9241-9, and three from previous studies conducted at NASA. The tasks focused on basic movements such as pointing, clicking, and dragging. Four cursor control devices were evaluated with and without Extravehicular Activity (EVA) gloves to identify desirable(More)
Touchsemen technology is well-suited for extreme environments, for example, rniemgravity. However, the usability of touchscreens has not been tested in this environment. The Human Factors and Ergonomics Laboratory (HFEL) at the NASA Johnson Space Center has conducted three evaluations of touchscreen usability both in a simulated weightless environment and(More)
A 6-week double-blind comparison of the therapeutic efficacy of alprazolam and imipramine in 90 depressed psychiatric outpatients revealed a significantly superior response to alprazolam in the first 2 weeks of treatment as measured by total scores on the Hamilton Rating Scale for Depression and the Brief Psychiatric Rating Scale. Further analyses revealed(More)
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