Chess databases as a research vehicle in psychology : modeling large data

The game of chess has often been used for psychological investigations, particularly in cognitive science. The clear-cut rules and well-defined environment of chess provide a model for investigations of basic cognitive processes, such as perception, memory, and problem solving, while the precise rating system for the measurement of skill has enabled investigations of individual differences and expertise-related effects. In the present study, we focus on another appealing feature of chess—namely, the large archive databases associated with the game. The German national chess database presented in this study represents a fruitful ground for the investigation of multiple longitudinal research questions, since it collects the data of over 130,000 players and spans over 25 years. The German chess database collects the data of all players, including hobby players, and all tournaments played. This results in a rich and complete collection of the skill, age, and activity of the whole population of chess players in Germany. The database therefore complements the commonly used expertise approach in cognitive science by opening up new possibilities for the investigation of multiple factors that underlie expertise and skill acquisition. Since large datasets are not common in psychology, their introduction also raises the question of optimal and efficient statistical analysis. We offer the database for download and illustrate how it can be used by providing concrete examples and a step-by-step tutorial using different statistical analyses on a range of topics, including skill development over the lifetime, birth cohort effects, effects of activity and inactivity on skill, and gender differences

Choosing to hear music: motivation, process, and effect

This chapter provides an overview of research on self-chosen music listening experiences, both recorded and live. The material is organized into the functional niches that music is chosen to be part of travel, brain work, body work, emotional work, and attendance at live events as an audience member. Four different recurring functions of self-chosen music use are identified: distraction, energizing, entrainment, and meaning enhancement. The chapter highlights the diversity of research being undertaken in areas such as travel, housework, pain relief, study, exercise, mood management, reminiscence, and music in autobiographical narrative. Music is shown to interact and intertwine with the contexts in which it is chosen and is not always listened to reverently, and the importance of agency is highlighted throughout

Contextualized music listening: playlists and the Mehrabian and Russell model

The present research considered everyday music listening in the context of eight situations, classified as high or low on Mehrabian and Russell’s (1974) Pleasure-Arousal-Dominance (PAD) dimensions. Completing a questionnaire, 344 participants considered the music they would select and created a playlist for a given situation. The music selected by participants (as playlists) for these eight situations differed along two dimensions, namely arousing and aesthetic. Rather than selecting music that would moderate arousal (Berlyne, 1971), results indicated that participants employed an arousal-optimization strategy. There were also differences in the music selected across situations on the aesthetic dimension. The findings also suggest that music chosen for situations is subject to injunctive norms, such that there was considerable variation between the music chosen for listening to on public transport or when washing dishes, whereas music selected for a wedding was perceived as more homogeneous. While previous research has considered music preference in terms of pleasure and arousal, the apparent role of injunctive norms may be related to dominance and requires additional research. More generally, the results indicate that Mehrabian and Russell’s PAD dimensions offer a useful framework for considering the relationship between music and the environmental context in which it is experienced

Soluble complement receptor one (sCR1) inhibits the development and progression of rat collagen-induced arthritis

We set out to determine whether inhibition of complement using sCR1 could influence the development and progression of collagen arthritis in the Lewis rat. Collagen arthritis was successfully established in the Lewis rat, using a novel immunization schedule. In separate experiments, cobra venom factor (CVF) and sCR1 were used to achieve systemic complement inhibition. Their respective effects on disease onset and on the progression of established disease compared with saline-treated control animals was explored. Arthritis was assessed by measurement of clinical score, paw diameter and paw volume. Complement inhibition using either CVF or sCR1, prior to the onset of clinical signs of inflammation, delayed the development of disease. CVF was ineffective in the treatment of established disease, whereas sCR1 delayed the progression of disease in affected joints and prevented the recruitment of further joints while the animals were complement-depleted. In the control saline-treated groups the disease continued to progress relentlessly. We conclude that complement activation is important in the initiation and maintenance of inflammation in collagen arthritis. The potent disease-modulating effect of sCR1 provides persuasive evidence that specific complement inhibiting agents may be an effective approach to the treatment of inflammatory joint disease