A five-factor model for motor, psychomotor, and visual-spatial tests used in the neuropsychological assessment of children

Empirically derived ability-achievement subtypes in a clinical sample

The purpose of the present study was to identify reliable and clinically meaningful patterns of ability and achievement using the WISC-III and WIAT. Cluster analysis was used to group the 182 WISC-III and WIAT profiles (10 WISC-III subtests and 4 WIAT subtests) of children between the ages of 9 and 14 years. Theoretical and empirical considerations were used to identify a cluster solution, which involved comparison of several five-, six- and eight-cluster solutions. A five-cluster solution was selected as being representative of the data, which was well replicated across three hierarchical clustering methods (i.e., complete linkage, average linkage-within groups, and average linkage-between groups (UPGMA)). The clusters were labeled based on their most salient characteristics, which included a group of predominantly low ability and achievement, a group demonstrating a pattern of verbal processing deficits, a group demonstrating a pattern of visual spatial/processing speed deficits, a group with low ability and achievement with average processing speed, and a group with deficits consistent with an ACID pattern. The external validity of the five subtypes was assessed through an evaluation of the relationship between cluster membership and neuropsychological test data. Most predictions regarding neuropsychological performance were supported by the data, providing further evidence of the validity of the five-cluster solution. Clinical implications of the ability-achievement typology and suggestions for future research are discussed.

Applying Luria's diagnostic principles in the neuropsychological assessment of children

The first part of this article examines the theoretical justification for applying Luria's approach in the assessment of children. It is concluded that Luria's concepts of functional systems and the principle of specifying primary and secondary deficits may be applied to children. However, the selection of functional components to assess should be based on traditions of child neuropsychology rather than on Luria's assessment of adults. In addition, the tendency for comorbid disorders, mechanisms of neural adaptation to damage, and the prevalent types of brain abnormality in children render brain-behavior relationships more complex in children than in adults. The second part of the article describes how Luria's methods were adapted for use with children. An assessment, NEPSY, was developed by integrating Luria's views with contemporary child neuropsychological traditions. The NEPSY includes 27 homogeneous and psychometrically developed subtests, standardized in the United States and Finland for the age range of 3 to 12 years. The rationale of analyzing disorders of cognitive processes through a comprehensive and systematic assessment of their components, characteristic of Luria's approach, was preserved, but more specific principles of diagnosis were modified. Research findings obtained with a previously published, Finnish NEPSY version are presented.

Internal consistency of three tests from the Halstead-Reitan neuropsychological battery for older children

The internal consistency of three neuropsychological tests was examined in a sample of 334 referred children (9-14 years of age). Coefficient alpha was calculated to estimate reliability on the Seashore Rhythm Test (SRT), two forms of the Speech Sounds Perception Test (SSPT), and the Aphasia Screening Test (AST). The standard SSPT appears to have relatively good internal consistency with an average coefficient of.81. The average coefficient for the abbreviated form of the SSPT was considerably lower (i.e.,.73), highlighting the superiority of the standard form in clinical practice. Internal consistency of the SRT was relatively low (i.e.,. 67). This level of reliability may be acceptable in group research and for component tests, but is marginal for independent clinical use. Coefficient alpha for the AST was moderate (i.e.,.77), suggesting adequate reliability for a screening test. These reliability estimates are compared to those obtained in previous studies using these tests in adult samples and with other tests commonly used with children.