Sibling attachment: The development of a new infant-based measure (SPPIR)

This paper describes a new infant-based measure for assessing infant attachment to a sibling during a modified strange situation procedure. Research has demonstrated that young siblings often form a special relationship and that they prefer to interact with one another rather than with an unfamiliar peer. Also it has been shown that older siblings can respond appropriately to the distress of an infant. Research on relationships has moved from frequency counts of discrete behaviours towards more global measures of the ways in which behaviour is organized. These have tended to focus upon the older child as caregiver or the influence of the mother-child relationship on child-child interaction during the strange situation. The main findings of previous studies are presented. This paper describes a new method for measuring sibling attachment. Advantages of the new scoring system over previous procedures are that it utilizes ethological attachment theory, it is infant-based, it allows for a variety of infant reactions to reunion with the older sibling, and it focuses on overall patterns of behaviour rather than tallies of frequences.     

Biomechanics of normal and pathological gait: implications for understanding human locomotor control

The biomechanical (kinetic) analysis of human gait reveals the integrated and detailed motor patterns that are essential in pinpointing the abnormal patterns in pathological gait. In a similar manner, these motor patterns (moments, powers, and EMGs) can be used to identify synergies and to validate theories of CNS control. Based on kinetic and EMG patterns for a wide range of normal subjects and cadences, evidence is presented that both supports and negates the central pattern generator theory of locomotion. Adaptive motor patterns that are evident in peripheral gait pathologies reinforce a strong peripheral rather than a central control. Finally, a three-component subtask theory of human gait is presented and is supported by reference to the motor patterns seen in a normal gait. The identified subtasks are (a) support (against collapse during stance); (b) dynamic balance of the upper body, also during stance; and (c) feedforward control of the foot trajectory to achieve safe ground clearance and a gentle heel contact.     

Reproducing the end location of a positioning movement: the long and short of it

Two experiments were conducted in an attempt to determine the conditions under which shifts in the starting position of a linear positioning response influenced the reproduction of the end location of movements of various lengths. In Experiment 1, response bias (i.e., shift in constant error) was affected by the direction of the shift in starting position between presentation and recall. For short (20 cm) and medium (50 cm) length movements, this relationship was evident regardless of hand used (left or right), direction of the movement (left to right or right to left), and length of the retention interval (5 or 45 s). However, no relation between response bias and the direction of the starting position shifts was apparent for long (80 cm) movements. The results of Experiment 2 in which more movement lengths were used revealed a response bias that corresponded to shifts in starting position primarily during the first few reproductions of the two shortest movements (20 and 30 cm). However, no systematic bias was evident for any length movement after three reproduction attempts. Possible strategies used by subjects to reproduce the end location of movements of various lengths were discussed.     

Functional Impulsivity and Speeded Ability Test Performance

The current study examines the influence of functional impulsivity on speeded ability test performance. As predicted, functional impulsivity was positively related to number of items attempted (i.e., speed), but its impact on total score was more complex. In particular, analysis of the relations between ability, functional impulsivity and accuracy revealed evidence of a suppressor effect. Specifically, functional impulsivity was found to be negatively related to accuracy, but only after ability differences were controlled. Taken as whole, the current results suggest functional impulsivity may influence test‐taking behavior, but it likely does not result in a systematic influence on observed scores. Directions for further research needed to clarify these relations are discussed.     

Intelligent diagnosing of intellectual disabilities in offenders: food for thought

Research on offenders with intellectual disabilities (IDs) in the criminal justice arena is on the rise, reflected by a growing number of relevant publications each year. However, there is a long recognized methodological problem that hampers the comparability of empirical studies and that raises doubts about the accuracy of prevalence rates, comorbidities, and various correlates and characteristics. In this paper we will argue that the crux of the problem can, on the one hand, be found in the plurality of assessment methods for intelligence and adaptive functioning, which are not all sufficiently reliable and valid. On the other hand, assessment of IQ in criminal justice and mental health-related areas appears to be informed more by practical aspects and needs rather than grounded in a solid theoretical model. Hence, we suggest that the Cattell-Horn-Carroll (CHC) model of intelligence has potential value in this regard, and deserves a closer look. Finally, we will discuss its incorporation into, and possible implications for, criminal justice practice and future study designs.     

Users of secondary school‐based counselling services and specialist CAMHS in Wales: A comparison study

Background: The increasing prevalence of mental health issues in young people has contributed to a rise in the provision of school‐based counselling services in the UK. Between 2008/09 and 2010/11, data were collected from users of secondary school‐based counselling services in Wales. Aims: To identify the characteristics of users of school‐based counselling services in Wales – including demographics, referral pathways, presenting issues, and predominant issues – and how they compare to users of specialist CAMHS in Wales and Welsh secondary school pupils in general. Method: Data were collected on 10,687 episodes of counselling. School counsellors completed a client record sheet after each counselling episode and submitted these to their Local Authority. Collated results were then compared to matched data from Welsh specialist CAMHS and Welsh secondary schools data. Results/findings: A typical user of a secondary school‐based counselling service in Wales was female, of white ethnicity, and from the ‘middle’ school years. There was a marked under‐representation of users from BME backgrounds. Users were most often referred by school staff, and the most common presenting issues were family‐related, anger, and behaviour‐related. Conclusions: There was a higher proportion of females accessing school‐based counselling services than males. This was in direct contrast to data from specialist CAMHS and possible explanations for this are discussed. The under‐representation of BME populations suggested that there were some equality issues associated with accessing these services. Implications for practice: Future research should explore equality issues associated with young people from BME backgrounds accessing intervention services.     

Perception of individuality in bat vocal communication: discrimination between, or recognition of, interaction partners?

Different cognitive processes underlying voice identity perception in humans may have precursors in mammals. A perception of vocal signatures may govern individualised interactions in bats, which comprise species living in complex social structures and are nocturnal, fast-moving mammals. This paper investigates to what extent bats recognise, and discriminate between, individual voices and discusses acoustic features relevant for accomplishing these tasks. In spontaneous presentation and habituation–dishabituation experiments, we investigated how Megaderma lyra perceives and evaluates stimuli consisting of contact call series with individual-specific signatures from either social partners or unknown individuals. Spontaneous presentations of contact call stimuli from social partners or unknown individuals elicited strong, but comparable reactions. In the habituation–dishabituation experiments, bats dishabituated significantly to any new stimulus. However, reactions were less pronounced to a novel stimulus from the bat used for habituation than to stimuli from other bats, irrespective of familiarity, which provides evidence for identity discrimination. A model separately assessing the dissimilarity of stimuli in syllable frequencies, syllable durations and inter-call intervals relative to learned memory templates accounted for the behaviour of the bats. With respect to identity recognition, the spontaneous presentation experiments were not conclusive. However, the habituation–dishabituation experiments suggested that the bats recognised voices of social partners as the reaction to a re-habituation stimulus differed after a dishabituation stimulus from a social partner and an unknown bat.