Testing Measurement Invariance in the Target Rotated Multigroup Exploratory Factor Model     

Conor V. Dolan  Frans J. Oort  Reinoud D. Stoel  Jelte M. Wicherts 《Structural equation modeling》2013,20(2):295-314

We propose a method to investigate measurement invariance in the multigroup exploratory factor model, subject to target rotation. We consider both oblique and orthogonal target rotation. This method has clear advantages over other approaches, such as the use of congruence measures. We demonstrate that the model can be implemented readily in the freely available Mx program. We present the results of 2 illustrative analyses, one based on artificial data, and the other on real data relating to personality in male and female psychology students.  相似文献   

Response to fluency-oriented intervention of Dutch poor readers     

Chris Struiksma  Aryan van der Leij  Reinoud Stoel 《Learning and individual differences》2009,19(4):541-548

Dysfluency is the major characteristic of dyslexia in languages with a relatively shallow orthography, particularly when unfamiliar words have to be processed. The present study investigated to what extent slow identification of unfamiliar words can be speeded up and whether the expected variation in response-to-intervention can be related to differences in the phonological recoding skills in order to gain insight in the core deficits of dyslexia. The intervention involved four months of continued individual practice of fluency after maximal accuracy was achieved. Response-to-intervention was made operational in terms of individual learning curves, derived from multilevel analysis with repeated measures of response times, number of trials and accuracy as dependent variables. Increasing fluency was indicated by response times getting shorter. An unselected group of poor grade 2 readers who received the intervention in addition to regular classroom practice improved their reading compared to a matched control group who received no additional training. As expected, there were substantial individual differences between students in terms of response-to-intervention (RTI). Good and poor treatment responders progressed comparably when the training was done in the relatively easy training condition with closed word sets of four letter words with one consonant cluster, repeating the overlapping cluster + vowel. Increasing the difficulty level of the training condition to word sets overlapping in consonant cluster only, resulted in substantial individual differences in all three dependent variables. In fact, the poor responders did not improve any more whereas the poor responders continued to do so. This particular characteristic of each student's individual learning curve appeared to be highly predictive of the overall response-to-intervention or intervention outcome. The contribution of this finding to the understanding of dyslexia is discussed in terms of RTI.  相似文献   

Relations between the development of school investment, self-confidence and language achievement in elementary education: a multivariate latent growth curve approach     

Reinoud D. Stoel  Thea T. D. Peetsma  Jaap Roeleveld 《Learning and individual differences》2001,13(4):345

Latent growth curve (LGC) analysis of longitudinal data for pupils' school investment, self-confidence and language ability is presented. A multivariate model is tested that relates the three developmental processes to each other and to intelligence. All processes show significant differences between children in their developmental curves. The increase in language ability and the decrease in school investment correspond with the hypotheses. No hypothesis is formulated about self-confidence, but an increase for some and a decrease for others are found. The hypothesis that development in language ability, school investment, and self-confidence are mutually positively associated is supported, as is the hypothesis that intelligence accounts for some of the differences in language ability. School investment, self-confidence, and intelligence each explain a different part of development in language ability.  相似文献   

The effects of task constraints on the organization of interception movements     

Valerie Fayt  Reinoud J. Bootsma  Ronald G. Marteniuk  Christine L. Mackenzie  Michel Laurent 《Journal of sports sciences》2013,31(6):581-586

In the light of the intensity coupling effects reported in the literature, subjects' capacities for independently controlling the absolute velocity of their movement at the point of interception was evaluated by asking them to learn to propel orthogonally approaching balls, varying in their speed of approach, into target boxes placed at various distances from the interception point. As required for successful accomplishment of the task, movement velocity was found to be adapted to the distance to be covered, with the near target giving rise to lower velocities and the far target giving rise to higher velocities even when the conditions were presented in random order. Nevertheless, even though target distance accounted for a substantial proportion of the total variance, a small but significant effect of ball approach speed on movement velocity was found, suggesting that intensity coupling is a persistent but modulable phenomenon in interception tasks.  相似文献   

Acquiring an Attacking Forehand Drive: The Effects of Static and Dynamic Environmental Conditions     

Reinoud J. Bootsma  Marc H. J. Houbiers  H. T. A. Whiting  Pieter C. W. van Wieringen 《Research quarterly for exercise and sport》2013,84(3):276-284

Abstract

Two groups of 10 novice subjects each were trained to perform attacking forehand drives in table tennis and land the balls as fast and as accurately as possible onto a target on the opposite side of the net under two different training conditions. Under the static training condition, the balls were to be struck from a constant position, and under the dynamic training condition, balls approached the subjects in a normal way. Both groups were tested under dynamic conditions prior to and after four days of training, during which they received 1,600 practice trials. Both groups of subjects were shown to increase the number of balls that landed on the target, and learning was also evident from an increased consistency of the direction of travel of the bat at the moment of ball/bat contact. However, no increase in consistency was found for the location of the bat at the moment of ball/bat contact and for the movement times. Thus, learning can occur in the absence of externally generated time-to-contact information, but this is not due to the establishment of a consistent movement form. Learning appears to progress from control at the moment of ball/bat contact backward, toward the moment of initiation.  相似文献