Congruence reconsidered

Carl Rogers' definitions of congruence are discussed. Four specific requirements are identified for the concept and practice of therapeutic congruence. Drawing on examples from practice, the interface between congruence and the other necessary and sufficient conditions of change is examined.     

Consistency of the factorial validity of the WISC-R for upper and lower SES groups

The WISC-R was factor analyzed for both upper and lower SES classifications from the standardization sample. Both two- and three-factor solutions were extracted, and these solutions generally parallel other previously reported two- and three-factor WISC-R solutions. The stability of these factors was then examined by calculating coefficients of congruence and salient variable similarity indices between matched factor pairs from the two SES groups. The three-factor solution was the most appropriate for both groups, though the two-factor solution was equally plausible. The WISC-R factor structure appears to be invariant with regard to SES.     

Group therapists' training: what predicts learning?

This field study represents the continuing effort to identify the determinants of learning within experiential small study groups. Thirty-seven training groups from the 1996 Institute of the American Group Psychotherapy Association were studied. Three process measures (Group Relationship Questionnaire [GRQ], Leader Adjective Measure [LAM], and Group Climate Questionnaire [GCQ]) were administered to 434 group members after the first two of four group sessions. Process variables were used to predict learning (measured by the Learning Evaluation Form [LEF]) at the end of the training groups. The factors derived from each of the measures showed good to excellent correspondence with previous studies employing the same instruments. Results suggest that perceptions of the leader and the group, rather than perceptions of one's own relationship to other group members, are more robust predictors of learning in these short-term training groups. Specifically, perceptions of an emotionally engaged group willing to confront conflict, and perceptions of a skillful leader, proved to be significant predictors of learning. Implications for the training of group therapists and group therapy research are discussed.     

Modeling variability of force during isometric contractions of the quadriceps femoris

The authors modeled variability of force during continuous isometric contractions of the quadriceps femoris. Twenty adults (aged 25 +/- 6 years old) performed isometric leg extensions. Target forces were 11 percentages of maximum voluntary contraction (%MVC), ranging from 2 to 95%, and 5 absolute levels, from 25 to 225 N. The authors used standard deviation of absolute force, coefficient of variation, and signal-to-noise ratio as measures of variability. The results suggested a nonlinear relationship between variability and level of force, which could best be expressed as %MVC and not as absolute force. Variability for continuous isometric contractions was described best by a sigmoidal logistic function. The sigmoidal pattern of variability as a function of %MVC is consistent with physiological mechanisms.     

Socioeconomic status and insomnia

This investigation compared the likelihood of insomnia and insomnia-related health consequences among individuals of different socioeconomic status. A random-digit dialing procedure was used to recruit at least 50 men and 50 women in each age decade from 20 to 80+ years old. Participants completed 2 weeks of sleep diaries as well as questionnaires related to fatigue, sleepiness, and psychological distress. Socioeconomic status was measured by education status assessed at 3 different levels: individual, household, and community. Results indicated that individuals of lower individual and household education were significantly more likely to experience insomnia even after researchers accounted for ethnicity, gender, and age. Additionally, individuals with fewer years of education, particularly those who had dropped out of high school, experienced greater subjective impairment because of their insomnia.     

Conceptualizing and Measuring Historical Trauma Among American Indian People

This article reports on the development of two measures relating to historical trauma among American Indian people: The Historical Loss Scale and The Historical Loss Associated Symptoms Scale. Measurement characteristics including frequencies, internal reliability, and confirmatory factor analyses were calculated based on 143 American Indian adult parents of children aged 10 through 12 years who are part of an ongoing longitudinal study of American Indian families in the upper Midwest. Results indicate both scales have high internal reliability. Frequencies indicate that the current generation of American Indian adults have frequent thoughts pertaining to historical losses and that they associate these losses with negative feelings. Two factors of the Historical Loss Associated Symptoms Scale indicate one anxiety/depression component and one anger/avoidance component. The results are discussed in terms of future research and theory pertaining to historical trauma among American Indian people.     

Anticipatory postural adjustments for altering direction during walking

The authors examined how individuals adapt their gait and regulate their body configuration before altering direction during walking. Eight young adults were asked to change direction during walking with different turning angles (0 degree, 45 degree, 90 degree), pivot foot (left, right), and walking speeds (normal and fast). The authors used video and force platform systems to determine participants' whole-body center of mass and the center of pressure during the step before they changed direction. The results showed that anticipatory postural adjustments occurred during the prior step and occurred earlier for the fast walking speed. Anticipatory postural adjustments were affected by all 3 variables (turn angle, pivot foot, and speed). Participants leaned backward and sideward on the prior step in anticipation of the turn. Those findings indicate that the motor system uses central control mechanisms to predict the required anticipatory adjustments and organizes the body configuration on the basis of the movement goal.     

Impulse and Movement Space-Time Variability

In 3 experiments, the authors examined movement space-time variability as a function of the force-time properties of the initial impulse in a movement timing task. In the range of motion and movement time task conditions, peak force, initial rate of force, and force duration were manipulated either independently or in combination across a range of parameter values. The findings showed that (a) impulse variability is predicted well by the elaboration of the isometric force variability scaling functions of L. G. Carlton, K. H. Kim, Y. T. Liu, and K. M. Newell (1993) to movement, and (b) the movement spatial and temporal outcome variability are complementary and well predicted by an equation treating the variance of force and time in Newton's 2nd law as independent random variables. Collectively, the findings suggest that movement outcome variability is the product of a coherent space-time function that is driven by the nonlinear scaling of the force-time properties of the initial impulse.