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Southern California Research Institute |
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Home | Purpose | Staff | Location and Facility | Tests and Equipment | Services | Publications | Clients | Legal |
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Home | Purpose | Staff | Location and Facility | Tests and Equipment | Services | Publications | Clients | Legal |
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TESTS AND EQUIPMENT |
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Audiometer A portable audiometer allows pure-tone threshold testing. Auditory thresholds are determined for both ears by adapting the sequence of stimulus presentation to the subject’s responses. The down two, up one rule is normally used on frequencies ranging from 250 Hz to 8000 Hz. |
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Bender-Gestalt The Bender-Gestalt Test requires the subjects to copy a series of patterns printed on nine cards. Evaluation of the test depends on the relationship between the various components of each pattern. |
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Critical Tracking Task As a trial on the critical tracking task begins, the video monitor displays a vertically-oriented arrow at center screen. A forcing function begins to move the arrow horizontally to the left and right of center. The subject uses a steering wheel in an effort to counteract the forcing function and keep the arrow centered. |
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Divided Attention Task The divided attention task requires the subject to simultaneously allocate attention to two different tasks, pursuit tracking and visual search. |
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Driving Simulator The driving simulator consists of a steering wheel, turn signal stalk, horn, brake, and accelerator. Three 17' monitors provide a 135-degree wide field-of-view. Drivers are required to maneuver through traffic, obey traffic signals, avoid collisions, change lanes, overtake slower vehicles, and yield to pedestrian crossings. |
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Motor-Free Visual Perception Test The MVPT is a test of visual perception which avoids motor involvement. Subjects are presented a stimulus and are asked to locate it among four alternatives. The only response required is that the subject point to one of the alternatives. A total of 36 stimuli are presented. |
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Perceptual Acuity Test As a trial on the critical tracking task begins, the video monitor displays a vertically-oriented arrow at center screen. A forcing function begins to move the arrow horizontally to the left and right of center. The subject uses a steering wheel in an effort to counteract the forcing function and keep the arrow centered. |
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Raven’s Standard Progressive Matrices This computerized version of the Raven’s SPM requires the subjects to look at a pattern with a missing piece and identify which of six alternatives best completes the pattern. Subjects select the correct alternative by touching it on the screen. |
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Useful Field of View The useful field of view consists of three subtests which assess speed of visual processing under increasingly complex task demands. During the tests, the subject must detect, identify, and localize briefly presented targets. |
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Vision Tests Visual acuity, the ability to see details, is measured with the Snellen chart and two versions of the Bailey-Lovie chart, the high-contrast version and the low-contrast version (10%). Contrast sensitivity, the ability to distinguish differences in brightness, is measured with the Pelli-Robson chart and the VCTS 6500 chart. |
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Wechsler Scales The WAIS is a test designed to measure intelligence. The WMS is a test designed to measure learning and memory. |
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Southern California Research Institute 7065 Hayvenhurst Avenue, Suite 9 |
