visual field defect

a reduction in the normal extent of the visual field, characterized by partial or total blindness. This is caused by an interruption in the flow of visual impulses between the retina and the visual cortex, which may be caused by a lesion before, after, or in the optic chiasm or in all or a part of the optic radiations; it can involve tracts of one or both eyes. Each possible lesion produces a different defect.

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Psychology term of the day

December 19th 2024

qualitative evaluation

an evaluation method that yields narratives gathered primarily from unstructured methods of data collection, naturalistic observation, and existing records. As an initial or divergent phase of program evaluation, it seeks to allow maximum opportunity to frame evaluation objectives. This approach is usually associated with a goal-free evaluation rather than a goal-based evaluation. Compare quantitative evaluation.