Development of a magnetic-resonance-compatible photoplethysmograph amplifier for behavioral and emotional studies

The purpose of the present study was to develop a magnetic resonance (MR) compatible photoplethysmograph (PPG) system that can measure the raw PPG signal during MR image acquisition. The system consists of an optic sensor that measures the optic signal, an optic cable that transmits a near-infrared optic signal, a signal amplifier, and a filter for noise removal. To minimize interactive noise, only the optic cable and the optic sensor module are located inside the MR room; the signal amplifier and filter are located outside the MR room. An experiment verified that a reliable PPG signal can be obtained without causing a deterioration in the MR image.     

When high achievers and low achievers work in the same group: The roles of group heterogeneity and processes in project‐based learning

Background . There has been an ongoing debate about the inconsistent effects of heterogeneous ability grouping on students in small group work such as project‐based learning. Aim . The present research investigated the roles of group heterogeneity and processes in project‐based learning. At the student level, we examined the interaction effect between students' within‐group achievement and group processes on their self‐ and collective efficacy. At the group level, we examined how group heterogeneity was associated with the average self‐ and collective efficacy reported by the groups. Sample . The participants were 1,921 Hong Kong secondary students in 367 project‐based learning groups. Method . Student achievement was determined by school examination marks. Group processes, self‐efficacy and collective efficacy were measured by a student‐report questionnaire. Hierarchical linear modelling was used to analyse the nested data. Results . When individual students in each group were taken as the unit of analysis, results indicated an interaction effect of group processes and students' within‐group achievement on the discrepancy between collective‐ and self‐efficacy. When compared with low achievers, high achievers reported lower collective efficacy than self‐efficacy when group processes were of low quality. However, both low and high achievers reported higher collective efficacy than self‐efficacy when group processes were of high quality. With 367 groups taken as the unit of analysis, the results showed that group heterogeneity, group gender composition and group size were not related to the discrepancy between collective‐ and self‐efficacy reported by the students. Conclusions . Group heterogeneity was not a determinant factor in students' learning efficacy. Instead, the quality of group processes played a pivotal role because both high and low achievers were able to benefit when group processes were of high quality.     

Asyntactic thematic role assignment by Mandarin aphasics: a test of the Trace-Deletion Hypothesis and the Double Dependency Hypothesis

This study examines the comprehension patterns of various sentence types by Mandarin-speaking aphasic patients and evaluates the validity of the predictions from the Trace-Deletion Hypothesis (TDH) and the Double Dependency Hypothesis (DDH). Like English, the canonical word order in Mandarin is SVO, but the two languages differ in that the head noun precedes the relative clause in English, but it follows the relative clause in Chinese. According to the Default Principle as stated in the TDH, the word order discrepancy will make subject relative clauses more difficult to comprehend for Mandarin agrammatics than object relative clauses, but the DDH predicts that agrammatic patients from the two languages have the same pattern of selective deficits. The results of this study support the prediction of the TDH.     

In search of subtypes of Chinese developmental dyslexia

The dual-route model offers a popular way to classify developmental dyslexia into phonological and surface subtypes. The current study examined whether this dual-route model could provide a framework for understanding the varieties of Chinese developmental dyslexia. Three groups of Chinese children (dyslexics, chronological-age controls, and reading-level controls) were tested on Chinese exception character reading, pseudocharacter reading (analogous to English nonword reading), novel word learning, and some phonological and orthographic skills. It was found that Chinese exception character reading and pseudocharacter reading were highly correlated and that orthographic skills was a better predictor of both Chinese exception character and pseudocharacter reading than was phonological skills. More than half (62%) of the children in the dyslexia sample were classified as belonging to the surface subtype, but no children were classified as belonging to the phonological subtype. These results suggested that the lexical and sublexical routes in Chinese are highly interdependent or that there may be only one route from print to speech as suggested by the connectionist models. Chinese dyslexic children generally are characterized as having delays in various phonological and orthographic skills, but some, such as those identified as surface dyslexics in the current study, are more severely impaired.     

Development of the Real-Time Subjective Emotionality Assessment (RTSEA) system

A new Real-Time Subjective Emotionality Assessment (RTSEA) system was developed for this study. The system is composed of two parts: an emotionality input and evaluation parts. An experiment was conducted in order to investigate the effectiveness of the RTSEA system. The present study compared Galvanic Skin Response (GSR) with the RTSEA by presenting 28 subjects with pictures that aroused either positive or negative emotion. Following the experiment, a subjective assessment using a questionnaire was given to the same subjects. According to the correlation coefficients, changes of the RTSEA had strong correlations with the changes of the GSR. Also, the questionnaire results showed marked similarity to the average responses of the RTSEA. In conclusion, the most remarkable characteristic of the present system is that it not only assesses the average emotionality when stimuli are presented, but also shows the trend of change in emotionality over time.     

Creative Reappropriation: Barth's Use of Calvin in the Münster Ethics (1928/29)

This article demonstrates Calvin's impact upon Barth's ethics through a close reading of Barth's MÏnster lectures on ethics. Already in these early lectures Barth insisted on the coherence of dogmatic and ethical reflection, and developed the basic structure and some characteristic themes of his mature ethical reflection in the Church Dogmatics . By showing the ways in which Barth was influenced by Calvin in these formative first ethics lectures the case is made that a thorough understanding of Calvin's theology is necessary for a correct appreciation of Barth's ethics and of his theology as a whole.     

Cognitive processing of corporate social responsibility campaign messages: the effects of emotional visuals on memory

ABSTRACT

This study explored the effects of visual strategies on consumers’ memory of corporate social responsibility (CSR) campaign messages. Using the limited capacity model of motivated mediated message processing (LC4MP), we examined how emotional CSR messages are cognitively processed—specifically, how emotional visuals in CSR messages affect two subprocesses of information processing: encoding and storage. We conducted a 2 (valence: positive vs. negative) × 2 (arousal: moderately arousing vs. highly arousing) within-subjects experiment across four different CSR issues. The results showed that recognition accuracy and sensitivity (d′) of company logos were best for moderately arousing negative images, whereas for recognition accuracy and sensitivity (d′) of company names, there were no significant differences across the emotional conditions. For cued recall of companies associated with CSR issues, the pattern was different—highly arousing negative images with aversive cues were the most effective. We discuss the theoretical and practical implications of these findings.     

Parent–Child Conflict Profiles in Chinese American Immigrant Families: Links to Sociocultural Factors and School‐Age Children's Psychological Adjustment

Research suggests that parent–child conflict is a salient family process in Asian immigrant families and often a stressful experience for Asian American youth due to value discrepancies between Asian and Western cultures. The present study examined ratings of parent–child conflict across conflict topics from parents' and children's perspectives in a sample of Chinese American immigrant families with school‐age children (N = 239; age = 7.5–11 years). Latent profile analyses identified three parent‐rated conflict profiles and four child‐rated conflict profiles. Parent and child conflict profiles were unrelated to each other and differentially related to family sociocultural factors and children's psychological adjustment. Parents' moderate conflict profile scored highest on parent‐rated child behavior problems and had the highest household density and lower parent Chinese orientation. Children's moderate‐specific and high conflict profiles scored higher on child‐reported behavior problems than the low conflict profile. These results highlight the need to assess family conflict from both parents' and children's perspectives and target parent–child conflict communication as a pathway to prevent or reduce behavioral problems in Chinese American children of immigrant families.     

A Nondegenerate Penalized Likelihood Estimator for Variance Parameters in Multilevel Models

Group-level variance estimates of zero often arise when fitting multilevel or hierarchical linear models, especially when the number of groups is small. For situations where zero variances are implausible a priori, we propose a maximum penalized likelihood approach to avoid such boundary estimates. This approach is equivalent to estimating variance parameters by their posterior mode, given a weakly informative prior distribution. By choosing the penalty from the log-gamma family with shape parameter greater than 1, we ensure that the estimated variance will be positive. We suggest a default log-gamma(2,λ) penalty with λ→0, which ensures that the maximum penalized likelihood estimate is approximately one standard error from zero when the maximum likelihood estimate is zero, thus remaining consistent with the data while being nondegenerate. We also show that the maximum penalized likelihood estimator with this default penalty is a good approximation to the posterior median obtained under a noninformative prior. Our default method provides better estimates of model parameters and standard errors than the maximum likelihood or the restricted maximum likelihood estimators. The log-gamma family can also be used to convey substantive prior information. In either case—pure penalization or prior information—our recommended procedure gives nondegenerate estimates and in the limit coincides with maximum likelihood as the number of groups increases.