Putting the bits together: an information theoretical perspective on morphological processing

In this study we introduce an information-theoretical formulation of the emergence of type- and token-based effects in morphological processing. We describe a probabilistic measure of the informational complexity of a word, its information residual, which encompasses the combined influences of the amount of information contained by the target word and the amount of information carried by its nested morphological paradigms. By means of re-analyses of previously published data on Dutch words we show that the information residual outperforms the combination of traditional token- and type-based counts in predicting response latencies in visual lexical decision, and at the same time provides a parsimonious account of inflectional, derivational, and compounding processes.     

The repeated insertion model for rankings: Missing link between two subset choice models

Several probabilistic models for subset choice have been proposed in the literature, for example, to explain approval voting data. We show that Marley et al.'s latent scale model is subsumed by Falmagne and Regenwetter's size-independent model, in the sense that every choice probability distribution generated by the former can also be explained by the latter. Our proof relies on the construction of a probabilistic ranking model which we label the repeated insertion model. This model is a special case of Marden's orthogonal contrast model class and, in turn, includes the classical Mallows -model as a special case. We explore its basic properties as well as its relationship to Fligner and Verducci's multistage ranking model.The authors are grateful to the National Science Foundation for grants SES98-18756 to Regenwetter and Peke, and SBR97-30076 to Regenwetter. This collaborative research was carried out in the context of the conference Random Utility 2000 held at Duke University and sponsored by NSF, the Fuqua School of Business and the Center for International Business Education and Research. We thank the editor and four referees for helpful suggestions and we are grateful to Prof. J. I. Marden for providing useful information on contrast models. We thank Moon-Ho Ho for programming and running the data analyses.     

Semantic aspects of morphological processing: transparency effects in Serbian

We examined the contribution of semantics to morphological facilitation in the visual lexical decision task at two stimulus onset asynchronies (SOAs) with Serbian materials. Primes appeared in Roman or Cyrillic characters. Targets always were printed in Roman. When primes were presented at an SOA of 250 msec, decision latencies to verbal targets (e.g., VOLIM) showed greatest facilitation after inflectionally (e.g., VOLE) related primes, significantly less after semantically transparent derived primes (e.g., ZAVOLE), and less again after semantically opaque derived primes (e.g., PREVOLE). Latencies after semantically transparent and opaque derived target words did not differ at an SOA of 48 msec. Both were slower than after inflectionally related primes. Stated generally, effects of semantic transparency among derivationally related verb forms were evident at long SOAs, but not at short ones. Under alphabet-alternating conditions, magnitudes of facilitation were greater overall, but the pattern was similar. The outcome suggests that restricted processing time for the prime limits the contribution of semantics to morphological processing and calls into question accounts that posit a task-invariant semantic criterion for morphological decomposition within the lexicon.     

Childhood vaccine refusal and hesitancy intentions in Croatia: insights from a population-based study

Considering that programmatic data suggest a recent rise in vaccine refusal in Croatia, this study, first of its kind in Southeast Europe, aimed to estimate the prevalence, and sociodemographic, and sociocultural determinants of childhood vaccine refusal and hesitancy (CVRH) intentions among Croatian adults. Multi-stage stratified population-based survey included 1000 individuals aged 18–88 years (M_age = 47.7, SD = 17.8), of whom 51.7% were women. The outcome, a categorical indicator, distinguished among individuals who would approve vaccinating their children (vaccine accepting), those who would approve some but not all vaccines (vaccine hesitant), and those who would refuse vaccination (vaccine refusing). A sizeable minority of participants was characterized by childhood vaccine refusal (10.6%) and hesitancy intentions (19.5%). In a multivariate assessment controlling for parenthood, the odds of vaccine hesitancy were significantly increased by a younger age (AOR = 1.96–3.03, p < .01). Religiosity (AOR = 1.12, p < .05) and the use of alternative medicine (AOR = 2.85, p < .001) increased the odds of vaccine refusal. However, individual characteristics seem to be relatively poor predictors of CVRH intentions in Croatia. Following the social contagion model, future research should move beyond individual-level approach and take into account social interaction and social network effects.     

Tryptophan Hydroxylase 1 Variant rs1800532 is Associated with Suicide Attempt in Serbian Psychiatric Patients but does not Moderate the Effect of Recent Stressful Life Events

Tryptophan hydroxylase 1 (TPH1) gene, coding for serotonin synthesizing enzyme, and recent stressful life events (SLEs) have been commonly associated with suicidal behavior. TPH1 has been also hypothesized to be involved in stress–response mechanisms. The aim of this study was to assess TPH1 variant rs1800532 and its possible interaction with recent SLEs as risk factors for suicide attempt (SA) in Serbian psychiatric patients, including 165 suicide attempters and 188 suicide nonattempters. rs1800532 and recent SLEs were independently associated with SA, while rs1800532 did not moderate the effect of recent SLEs on SA vulnerability among Serbian psychiatric patients.     

Internet Use Associated Body-Surveillance Among Female Adolescents: Assessing the Role of Peer Networks

Body-surveillance is a core element of self-objectification, which has been recognized as a health hazard, particularly in female adolescents. Although the role of peers in self-objectification has been documented, the utility of ego-centered network approach has not been demonstrated. Using an online sample of 211 Croatian female adolescents, this study explored whether structural characteristics of self-reported networks (composed of same-sex peers one has discussed sexuality with) moderated the relationship between the use of social networking sites (SNS) and body-surveillance. Controlling for parental monitoring and accounting for self-esteem—which was negatively associated with adolescent body-surveillance—smaller network size amplified the association between SNS use and body-surveillance. Apart from confirming the overlap between offline and online peer networks in shaping adolescent body image concerns, this study’s findings suggest that adolescent women who frequently use SNS and those with fewer close friends are more vulnerable to social media-related body-objectification than their peers.     

Clients’ Perception of Outcome of Team-Based Prenatal and Reproductive Genetic Counseling in Serbian Service Using the Perceived Personal Control (PPC) Questionnaire

This is the first study in Serbia and the region of South-East Europe dedicated to clients’ perception of outcome and efficiency of prenatal and reproductive genetic counseling. The primary aim of this study was to assess overall value and success of genetic counseling in prenatal and reproductive care with regard to perceived personal control of clients, reflecting also in a part patient comprehension, knowledge retention, and empowerment in decision-making. The standardized Perceived Personal Control questionnaire (PPC) was used for the assessment of 239 female participants. First, we performed a complete validation of the psychometric characteristics of the Serbian-language version of the PPC questionnaire. The validation of the questionnaire permits other researchers from Serbian-speaking regions of South-East Europe to use this standard instrument to assess the effectiveness of prenatal genetic counseling in their communities and analyze advantages and disadvantages of their counseling models. We also measured social and demographic characteristics of participants. Further, we analyzed effects of our team-based prenatal and reproductive genetic counseling model through (a) calculation of PPC scores at three different stages (before initial, after initial, and before second counseling session), and (b) by assessing participants’ responses by indication for referral (advanced maternal age, abnormal biochemical screening, family history of hereditary disorders, maternal exposure to drugs, exposure to radiation, exposure to infective agents, infertility or recurrent abortions, and miscellaneous). The results indicate that participants’ knowledge after initial counseling increased significantly and after that remained stable and sustainable. A satisfactory level of confidence among participants had been achieved, in that many felt an increased sense of control over their situation and emotional response to it. Indirectly, these results indicate the success of a team-based prenatal genetic counseling model, which has not been assessed in the literature to date.     

Cross‐modal facilitation of mental rotation: Effects of modality and complexity

Performance in a visual mental rotation (MR) task has been reported to predict the ability to recognize retrograde‐transformed melodies. The current study investigated the effects of melodic structure on the MR of sequentially presented visual patterns. Each trial consisted of a five‐segment sequentially presented visual pattern (standard) followed by a five‐tone melody that was either identical in structure to the standard or its retrograde. A visual target pattern was either the rotated version of the standard or unrelated to it. The task was to indicate whether the target pattern was a rotated version of the standard or not. Periodic patterns were not rotated but melodies facilitated the rotation of non‐periodic patterns. For these, rotation latency was determined by a quantitative index of complexity (number of runs). This study provides the first experimental confirmation for cross‐modal facilitation of MR.