Uncovering the Value and Meaning of a Horticulture Therapy Program for Clients at a Long-Term Adult Inpatient Psychiatric Facility

This qualitative study investigated the value and meaning of the Greenhouse Program and its impact on recovery goals of residents with severe and persistent mental illness at an adult, long-term psychiatric facility. Eight participants and two occupational therapists were interviewed. Findings revealed two main themes, relating to the essence of the program and personal growth of the participants, supplemented by six sub-themes. The findings suggest that initiatives, such as the Greenhouse Program, are an appropriate intervention that occupational therapy professionals can use in adult inpatient psychiatric facilities.     

Book reviews

Cutting, J. E. Perception with an eye for motion. Cambridge, Mass: The MIT Press, 1986. Pp. 321.ISBN 0-262-03119-1. £29.95.

Kimble, G. A. and Schlesinger, K. (Eds.). Topics in the history of psychology, Volume 1. Hillsdale, N.J.: Lawrence Erlbaum Associates, Inc., 1985. Pp. 409. ISBN 0-89859-312-3. £36.00.

Bruce, V. and Green, P. (1985). Visual perception :Physiology, psychology and ecology. London : Lawrence Erlbaum Associates Ltd. Pp. 369. ISBN 0-86377-012-6. Hardback £26.95; paperback £8.95.

Pylyshyn, Z. W. & Demopoulos, W. (Eds.). Meaning and cognitive structure : Issues in the computational theory of mind. Norwood, N.J.: Ablex Publishing Corporation, 1986. Pp. xi + 264. ISBN 0-89391-372-3.£36.50.

Pylyshyn, Z. W. (Ed.). The robot's dilemma: The frame problem in artificial intelligence. Norwood, N.J.: Ablex Publishing Corporation, 1987. Pp. xi +156. ISBN 0-89391-371-5. £25.50.

Beaton, A. (1985). Left side, right side : A review of laterality research. London: Batsford. Pp. 364. ISBN 0-7134-4389-8. £25.00.     

The processing of non-target words: Semantic or not?

It is known that people reacting to visual words may be affected by the meaning of accompanying non-target words. On the approach to perception developed by Treisman (e.g. 1986), this is surprising, because meaning might be thought to require analysis of conjunctions of physical features and so should remain uncomputed for non-target words. Treisman's approach does, however, assert that analysis of the target may unleash further processes that would prime the system for detection of related words. If this were so, then presentation of the target earlier than the distractors would increase the effect of the latter; whereas if analysis of non-targets were independent of priming, they might be expected to have a smaller effect when delayed. Further, if the sets of words involved are small and familiar, then individual features of primed non-targets, rather than conjunctions of features, might trigger interference. They might especially do so when spatial separation of target and non-target is small.

Five experiments using a paradigm developed by Shaffer and LaBerge confirm that the meaning of non-target words affects response to targets; but (1) this is more true for early than for late arrival of the target; (2) it is affected by target/non-target separation in space; (3) it is true for familiar sets of repeated words but not, in these data, for words used once only in the experiment. It is therefore concluded that the results are more consistent with a Treisman type of explanation than with a theory of universal and automatic full analysis.     

The relationship between multisensory integration and IQ in children

It is well accepted that multisensory integration has a facilitative effect on perceptual and motor processes, evolutionarily enhancing the chance of survival of many species, including humans. Yet, there is limited understanding of the relationship between multisensory processes, environmental noise, and children's cognitive abilities. Thus, this study investigated the relationship between multisensory integration, auditory background noise, and the general intellectual abilities of school-age children (N = 88, mean age = 9 years, 7 months) using a simple audiovisual detection paradigm. We provide evidence that children with enhanced multisensory integration in quiet and noisy conditions are likely to score above average on the Full-Scale IQ of the Wechsler Intelligence Scale for Children-Fourth Edition (WISC-IV). Conversely, approximately 45% of tested children, with relatively low verbal and nonverbal intellectual abilities, showed reduced multisensory integration in either quiet or noise. Interestingly, approximately 20% of children showed improved multisensory integration abilities in the presence of auditory background noise. The findings of the present study suggest that stable and consistent multisensory integration in quiet and noisy environments is associated with the development of optimal general intellectual abilities. Further theoretical implications are discussed.     

Shared-Reading Volume in Early Childhood Special Education Classrooms

This study describes book reading practices occurring in early childhood special education (ECSE) classrooms in comparison to early childhood education (ECE) classrooms. Reading logs submitted by 19 ECSE teachers and 13 ECE teachers over one academic year included all books read in whole class settings; these logs were analyzed to assess the volume of book reading taking place and the types of books read. On average, ECSE teachers report reading less than one book per day and for less than seven minutes per day and ECSE teachers utilize far more narrative books than any other genre. Implications and future research directions are discussed.     

Structures and strategies: Where are we now?

Summary Psychological opinion tends to sway between a view that people are almost infinitely flexible and a view that there are definite and unchangeable fundamental mechanisms that always work in the same way and set limits of flexibility. A popular compromise has been to suppose that lower mechanisms are as determinate as typewriters, while higher ones are unanalysable, autonomous, and perhaps even beyond scientific enquiry. The point of view in this paper favours a different compromise; very early and elementary operations are thought to be done in different ways, depending on the goals and experience of the person. There is, however, a good deal of constraint, which allows laws and principles to be laid down. Yet, there is also a degree of strategic flexibility in the operations actually performed that goes further than would be allowed by theorists of a different persuasion. The selective operations of attention are not due to unalterable mechanisms, nor does there seem to be convincing evidence of universal and invariant computation of all aspects of the input. What is computed, briefly, is the minimum necessary to perform the task before the person.     

Monotic and dichotic presentation of phonemic elements in a backward recognition-masking paradigm

Summary Auditory processing was examined in eight normal subjects using monotic and dichotic presentations of phonemic elements in an auditory backward recognition-masking paradigm. Experimental trials consisted of the presentation of one of three equiprobable consonant-vowel targets (/ba/,/da/,/ga/) followed by a vowel masker (/a/), separated by a variable silent interstimulus interval (ISI). For the dichotic condition, the mean percentage of correct recognition scores for target identification improved systematically with increases in ISIs, reaching an asymptote followed by an apparent plateau. In contrast, mean performance accuracy for the monotic condition revealed a U-shaped function for signal pairs having short temporal offsets. Although the dichotic presentations resulted in overall lower mean recognition scores, comparability between listening conditions was observed at prolonged ISIs. Observed differences in performance between the monotic and dichotic conditions at short-duration ISIs suggested the existence of different processing mechanisms, correlated with integration and interruption of phonemic pairs, for target-mask interactions occurring in close temporal succession.     

Preferred rates of repetitive tapping and categorical time production

In a constrained finger-tapping task, in which a subject attempts to match the rate of tapping responses to the rate of a pacer stimulus, interresponse interval (IRI) was a nonlinear function of interstimulus interval (ISI), in agreement with the results of Collyer, Broadbent, and Church (1992). In an unconstrained task, the subjects were not given an ISI to match, but were instructed to tap at their preferred rate, one that seemed not too fast or too slow for comfortable production. The distribution of preferred IRIs was bimodal rather than unimodal, with modes at 272 and 450 msec. Preferred IRIs also tended to become shorter over successive sessions. Time intervals that were preferred in the unconstrained task tended to be intervals that were overproduced (IRI > ISI) when they were used as ISIs in the constrained task. A multiple-oscillator model of timing developed by Church and Broadbent (1990) was used to simulate the two tasks. The nonlinearity in constrained tapping, termed theoscillator signature, and the bimodal distribution in unconstrained tapping were both exhibited by the model. The nature of the experimental results and the success of the simulation in capturing them both provide further support for a multiple-oscillator view of timing.