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In three experiments, we compared the effectiveness of rainbow writing and retrieval practice, two common methods of spelling instruction. In experiment 1 (n = 14), second graders completed 2 days of spelling practice, followed by spelling tests 1 day and 5 weeks later. A repeated measures analysis of variance demonstrated that spelling accuracy for words trained with retrieval practice was higher than for words trained with rainbow writing on both tests (?[subscript p][superscript 2] = 0.49). In experiments 2 (second graders, n = 16) and 3 (first graders, n = 12), students completed 2 days of spelling practice followed by a spelling test 1 day later. Results replicated experiment 1; spelling accuracy was higher for words trained with retrieval practice compared with rainbow writing (?[subscript p][superscript 2] = 0.42 and 0.64, respectively). Furthermore, students endorsed both liking and learning from retrieval practice at least as much as (and sometimes more than) rainbow writing. Results demonstrate that retrieval practice is a more useful (and as engaging) training method than is rainbow writing and extend the well-established testing effect to beginning spellers.

The production effect, the memorial benefit for information read aloud versus silently, has been touted as a simple memory improvement tool. The current experiments were designed to evaluate the relative costs and benefits of production using a free recall paradigm. Results extend beyond prior work showing a production effect only when production is manipulated within subject, not between, using a free recall paradigm. Furthermore, the results also indicate that the production effect is primarily driven by decreased memory for items read silently, not increased memory for items read aloud.

In the current set of studies, a new hypothesis regarding the cause of the commonly observed U-shaped serial position effect (SPE) in spelling is introduced and tested. Instead of greater competition during output or weaker positional representation for word-medial letters, commonly accepted explanations for the cause of the SPE, the "orthographic texture hypothesis" suggests that variations in the activation strength of individual letters are responsible for the variations typically observed in spelling accuracy as a function of letter position. Sound-letter convergence, a measure of orthographic texture referring to how often a single letter appears in a sound's spelling, may be responsible for higher accuracy rates at word-flanking letter positions. Indeed, when sound-letter convergence was manipulated, spelling accuracy was as high as or higher in word-medial letter positions than in word-initial or-final letter positions indicating that letter position alone cannot account for the pervasive U-shaped serial position effect.

We investigated whether changes in loneliness during middle childhood as well as from middle childhood into adolescence were associated with adolescent self-harm behaviors and suicidal thoughts using a community sample of 889 participants. Multivariate logistic regressions indicate that the relationship between changes in loneliness and suicidality is no longer statistically significant once depression and externalizing behavior problems are included as controls. Follow-up analyses indicate that increases in loneliness indirectly affect self-harm behaviors and suicidal thoughts through depression and externalizing behavior problems. These findings are consistent with other studies on peer relationships and adolescent suicidality, suggesting that experiences with peers indirectly affect risk for suicidality through mental health problems. These findings highlight the importance of considering how experiences in middle childhood peer relationships affect risk for suicide in consecutive developmental periods, particularly adolescence. (Contains 2 tables.)

A central issue in the study of reading and spelling has been to understand how the consistency or frequency of letter-sound relationships affects written language processing. We present, for the first time, evidence that the sound-spelling frequency of "subgraphemic" elements of words (letters within digraphs) contributes to the accuracy with which these letters are produced in spelling. We report findings from 2 studies that demonstrate that letters within digraphs display differential susceptibility to error under conditions of disruption to orthographic working memory (O-WM). In the 1st, O-WM was disrupted as a result of neurological damage; in the 2nd, O-WM disruption was produced in neurologically intact, skilled spellers under dual task conditions with a shadowing task carried out during spelling. In both studies, segments with low versus high levels of sound-letter convergence, a measure of the frequency of sublexical mappings, were more vulnerable to disruption even when factors such as letter position, consonant-vowel context, and phoneme-to-grapheme mapping probability of the digraphs were controlled. These results contribute to our understanding of the internal texture of orthographic representations, providing evidence that individual letters differ in their activation strength and, as a result, in their susceptibility to error. (Contains 8 tables, 6 figures and 4 footnotes.)

We investigated how the lexical and sublexical processes interact in spelling using an articulatory suppression task to disrupt the sublexical process in a dysgraphic patient (JDO). Using a similar task, Folk et al. (2002) found evidence that the sublexical process interacts with the lexical process by strengthening a target word's graphemes, We replicated the findings of Folk et al. in a patient with a more severe deficit to the lexical process, We compared the error patterns produced under normal spelling conditions versus spelling during articulatory suppression and found an increase in lexical substitution errors ("thaw" → T-H-O-U-G-H) under articulatory suppression. These findings indicate that by strengthening a target word's graphemes, the sublexical process helps to create an advantage for a target word over form-related word neighbours that compete with it for output. [ABSTRACT FROM AUTHOR]

Compares a flagellar sheath protein of Helicobacter pylori to HpaA, a putative N-acetylneuraminyllactose-binding hemagglutinin. Details on the cloning and expression of the gene encoding a flagellar sheath protein; Location of HpaA in Helicobacter pylori.