Letter position information and printed word perception: the relative-position priming constraint

Six experiments apply the masked priming paradigm to investigate how letter position information is computed during printed word perception. Primes formed by a subset of the target's letters facilitated target recognition as long as the relative position of letters was respected across prime and target (e.g., "arict" vs. "acirt" as primes for the target "apricot"). Priming effects were not influenced by whether or not absolute, length-dependent position was respected (e.g., "a-ric-t" vs. "arict"/"ar-i-ct"). Position of overlap of relative-position primes (e.g., apric-apricot; ricot-apricot; arict-apricot) was found to have little influence on the size of priming effects, particularly in conditions (i.e., 33 ms prime durations) where there was no evidence for phonological priming. The results constrain possible schemes for letter position coding.     

Aging, memory and visual search

Potential age-related differences in the memory processes that underlie visual search are examined in the present study. Using a dynamic, gaze-contingent search paradigm developed to assess memory for previously examined distractors, older adults demonstrated no memory deficit. Surprisingly, older adults made fewer refixations compared to their younger counterparts, indicating better memory for previously inspected objects. This improved memory was not the result of a speed-accuracy trade-off or larger Inhibition-of-Return effects for older than for younger adults. Additional analyses suggested that older adults may derive their benefit from finer spatial encoding of search items. These findings suggest that some of the memory processes that support visual search are relatively age invariant.     

Reading strategies and prior knowledge in learning from hypertext

In two experiments, we identified two main strategies followed by hypertext readers in selecting their reading orders. The first consisted in selecting the text semantically related to the previously read section (coherence strategy), and the second in choosing the most interesting text, delaying reading of less interesting sections (interest strategy). Comprehension data revealed that these strategies affected learning differently as a function of the reader's prior knowledge. For low-knowledge readers, the coherence strategy supported better learning of the content. This effect seems to rely on the improvement of reading order coherence induced by this strategy. By contrast, for intermediate-knowledge readers the coherence and the interest strategies benefited comprehension equally. In both cases, learning was supported through the active processing induced by these strategies. Discussion focuses on resolving inconsistencies in the literature concerning whether or not hypertext supports better comprehension than does traditional linear texts.     

Effect of personality dimensions on the diurnal pattern of motor activity

The effects of personality dimensions, age, and gender on 24-hour motor activity patterns were studied in 101 healthy subjects between 20-70 years. We measured motor activity by wrist-actigraphy and personality dimensions by the Tridimensional Personality Questionnaire (TPQ) of Cloninger. Random Regression Models were used to estimate the effects of personality dimensions, age, and gender on the diurnal pattern of motor activity. Harm Avoidance as well as Reward Dependence influenced the overall level of motor activity, independent of age and gender. Subjects high on Harm Avoidance showed lower activity levels than subjects low on Harm Avoidance, whereas subjects high on Reward Dependence had higher overall levels of motor activity than subjects low on Reward Dependence. Older subjects were found to be less active than younger subjects, but the activity level did not differ between males and females.     

Categorizing a moving target in terms of its speed,direction, or both

Pigeons categorized a moving target in terms of its speed and direction in an adaptation of the randomization procedure used to study human categorization behavior (Ashby & Maddox, 1998). The target moved according to vectors that were sampled with equal probabilities from two slightly overlapping bivariate normal distributions with the dimensions of speed and direction. On the average, pigeons categorized optimally in that they attended to either speed or direction alone, or divided attention between them, as was required by different reinforcement contingencies. Decision bounds were estimated for individual pigeons for each attentional task. Average slopes and y intercepts of these individually estimated decision bounds closely approximated the corresponding values for optimal decision bounds. There is therefore at least one task in which pigeons, on the average, display flexibility and quantitative precision in allocating attention to speed and direction when they categorize moving targets.     

Evaluating the AWARE Inventory as a measure of relationship factors among a sample of high school students

The Awareness of Attitudes and Relationship Expectations (AWARE) Inventory was administered to 160 high school students in Wyoming. Factor analysis showed the inventory did not have the expected 11 dimensional factor structure. Most of the intended 10-item scales yielded unacceptably low estimates of internal consistency reliability. Through an iterative process, one internally consistent scale of 17 items (alpha = .80) was derived. Researchers should be careful to evaluate the AWARE Inventory with their own samples before proceeding under an assumption that its scales reliably assess the 11 dimensions expected.     

A personal construct psychology view of relapse: indications for a narrative therapy component to stuttering treatment

Relapse following treatment for stuttering is a common problem for many clients. It has often been suggested that one factor contributing to relapse is the client's difficulty in adjusting to a new role as a fluent speaker. In this tutorial article, we first present a personal construct view of relapse, which suggests that this difficulty may be addressed by increasing the meaningfulness of the fluent speaker role for the speaker. Section 3 proposes that post-treatment success for persons who stutter may be facilitated by the use of a narrative approach to counseling in which the meaningfulness of the fluent speaker role is elaborated. In this approach, clients are guided through a process of deconstructing their stuttering-dominated personal narrative, followed by the reconstruction of an alternative narrative that is more compatible with being a fluent speaker. EDUCATIONAL OBJECTIVES: The reader will (1) learn about a personal construct psychology perspective on resistance and relapse in stuttering therapy, (2) be able to describe a narrative approach to counseling for people who stutter that is directed toward the long-term maintenance of fluent speech and the steps of deconstruction of the dominant stuttering narrative and reconstruction of a new, more fluent personal narrative, and (3) be able to prepare a series of narrative interview questions with which to engage clients in conversations that may facilitate the deconstruction and reconstruction processes.