Phillips P P, Halpin G
Arch Phys Med Rehabil. 1978 Jul;59(7):327-30.
Two short forms of the Porch Index of Communicative Ability (PICA) were derived using data from 50 adult aphasic patients. Subtest, modality and overall intercorrelations, internal consistency reliability estimates, means and standard deviations were computed for both forms and full-length test. Results indicate that the short forms are equivalent. Further, they seem to be measuring the same traits as the long form, have only slightly lower reliability, and have practically identical means and standard deviations across all subtest, modality and overall scores.
运用50名成年失语症患者的数据得出了交际能力的波奇指数（PICA）的两种简短形式。针对这两种简短形式和完整测试，计算了子测试、模态以及整体的相互关系、内部一致性信度估计、均值和标准差。结果表明，这两种简短形式是等效的。此外，它们似乎在测量与长形式相同的特质，信度仅略低，并且在所有子测试、模态和整体得分上的均值和标准差几乎相同。
