A longitudinal investigation of maternal touching across the first 6 months of life: Age and context effects

The types of touch used by 12 mothers with their 1-, 3- and 5.5-month-old infants were examined longitudinally during two different interaction contexts lasting 5 min each. Changes in maternal touching as a function of infants’ age and interaction context were revealed.     

Order Matters! Influences of Linear Order on Linguistic Category Learning

Linguistic category learning has been shown to be highly sensitive to linear order, and depending on the task, differentially sensitive to the information provided by preceding category markers (premarkers, e.g., gendered articles) or succeeding category markers (postmarkers, e.g., gendered suffixes). Given that numerous systems for marking grammatical categories exist in natural languages, it follows that a better understanding of these findings can shed light on the factors underlying this diversity. In two discriminative learning simulations and an artificial language learning experiment, we identify two factors that modulate linear order effects in linguistic category learning: category structure and the level of abstraction in a category hierarchy. Regarding category structure, we find that postmarking brings an advantage for learning category diagnostic stimulus dimensions, an effect not present when categories are non-confusable. Regarding levels of abstraction, we find that premarking of super-ordinate categories (e.g., noun class) facilitates learning of subordinate categories (e.g., nouns). We present detailed simulations using a plausible candidate mechanism for the observed effects, along with a comprehensive analysis of linear order effects within an expectation-based account of learning. Our findings indicate that linguistic category learning is differentially guided by pre- and postmarking, and that the influence of each is modulated by the specific characteristics of a given category system.     

恋爱关系中触摸和依恋对嫉妒的影响

选取恋爱中的青年,探讨触摸类型、依恋和嫉妒的关系。实验1选取50名大学生,采用想象情境范式,探究触摸类型（分为“无触摸、脸部触摸和腰部触摸”三种条件）对嫉妒的影响。选择害怕、生气、尴尬、性唤起、悲伤和妒忌作为测量指标。结果显示,三种条件下嫉妒情绪无显著差异。实验2选取113名青年,将无触摸条件分为远距离和近距离两种,进一步探讨触摸类型、依恋和嫉妒的关系。依恋的测量选用亲密关系经验问卷,分为焦虑、回避两个维度。结果发现：（1）在远距离无触摸条件下,依恋焦虑和悲伤、害怕、妒忌、生气正相关;（2）近距离无触摸条件下,依恋回避和悲伤、妒忌、生气负相关;（3）脸部触摸条件下,依恋焦虑和害怕、性唤起正相关。总的来看,爱情依恋对嫉妒情绪的影响受到触摸类型的调节。     

Early tactile experience of low birth weight children: links to later mental health and social adaptation

The purpose of this study was twofold: to determine (1) the degree to which specific qualities of maternal touch may contribute to the low birth weight infant's emotional and behavioural problems as well as social adaptation, and (2) the relationship between maternal touch and a mother's other caregiving behaviour. The sample included 114 socioculturally diverse infants and their mothers who were videotaped during an infant feeding when the baby was 3 months old. This videotape was analysed to assess dimensions of mother–infant interaction, including maternal touch. Data on perinatal risk and the mother's acceptance versus rejection of the infant were also acquired. Social adaptation and emotional/behavioural problems were measured when the child was 2 years of age. Hierarchical regression analyses indicated that maternal touch accounted for 15% of the variance in the likelihood of a child having emotional/behavioural problems at age 2. Children who received more nurturing touch had significantly fewer internalizing problems (such as depression) while children receiving both more frequent touch and harsh touch had more externalizing problems (such as aggressive behaviour). Infants who were less responsive to their caregivers were especially at risk of developing aggressive/destructive behaviour as a result of frequent touch. But less responsive infants also appeared to benefit most from greater use of diverse types of maternal touch, accounting for 6% of the variance in superior adaptive behaviour at age 2. Nurturing touch was the only quality that showed even a modest relationship to other caregiving behaviour, suggesting that touch may play a distinct role in the infant's psychosocial development. Copyright © 2001 John Wiley & Sons, Ltd.     

The Use of Touch in Counseling: An Ethical Decision‐Making Model

Although some counselors have advocated for the limited use of touch in counseling, others have argued that touch has no place within the counseling relationship. Despite the controversy, the use of touch has been shown to have a number of therapeutic benefits; however, there are few ethical decision‐making models that are appropriate for considering the use of touch in counseling. The authors discuss the controversy surrounding the use of touch and the benefits/contraindications of touch. The 5 ethical principles of counseling are also examined; a new ordering of the principles is presented as a useful ethical decision‐making model when considering the use of touch in counseling.     

"That's not a real body": identifying stimulus qualities that modulate synaesthetic experiences of touch

Mirror-touch synaesthesia is a condition where observing touch to another’s body induces a subjective tactile sensation on the synaesthetes body. The present study explores which characteristics of the inducing stimulus modulate the synaesthetic touch experience. Fourteen mirror-touch synaesthetes watched videos depicting a touch event while indicating (i) whether the video induced a tactile sensation, (ii) on which side of their body they felt this sensation and (iii) the intensity of the experienced sensation. Results indicate that the synaesthetes experience stronger tactile sensations when observing touch to real bodies, whereas observing touch to dummy bodies, pictures of bodies and disconnected dummy body parts elicited weaker sensations. These results suggest that mirror-touch synaesthesia is not entirely bottom-up driven, but top-down information, such as knowledge about real and dummy body parts, also modulate the intensity of the experience.     

Touch in Therapy: An Effort to Make the Unknown Known

This paper is an exploratory study based on interviews with four psycho-analytically-oriented therapists who touched their patients. It examines how the therapists and their patients conceptualized their experience. The therapists reported that the decision to touch, in the five cases presented here, was guided by the specific needs of their patients and their patient's circumstances rather than by their orientation and their overall attitude towards touch. Positive outcomes are reported in four out of the five cases. For these patients touch provided safety, grounded them in the here and now, promoted growth, integration and differentiation, and assuaged pain. In one case the outcome of touch for the patient is not known. Results are discussed in light of the literature on the use of touch.     

Influence of cognitive stance and physical perspective on subjective and autonomic reactivity to observed pain and pleasure: An immersive virtual reality study

Observing others’ pain may induce a reaction called personal distress that may be influenced by top-down (imagine self or other in pain, i.e., self- vs other-oriented stance) and bottom-up (physical perspective of those who suffer, i.e., first vs third person perspective- 1PP vs 3PP) processes. The different contributions of these processes have not been teased apart. By capitalizing on the power of Immersive Virtual Reality, we explored how behavioural (subjective ratings) and physiological reactivity (skin conductance reactivity, SCR) to pain and pleasure delivered to an avatar was influenced by Cognitive stance and Physical perspective. Taking an Other-Oriented stance leads to attributing higher congruent valence (i.e. pain rated as unpleasant and pleasure as pleasant) and intensity to the stimuli and induces reduced SCR. Ownership over the virtual limb was maximal in 1PP where physiological reactivity to the stimuli was comparable. Our results highlight different components underpinning reactivity to pain and pleasure.     

The Big Five personality traits and perceptions of touch to intimate and nonintimate body regions

This investigation tested whether (1) the Big Five personality traits contribute to favorable perceptions of touch from a relational partner, (2) participants’ sex or personality better predicted positive perceptions of touch, and (3) perceptions of touch vary as a function of relationship satisfaction. A total of 305 participants aged 18–69 years completed self-report measures of reactions to touch, personality, and relationship satisfaction. Results showed that agreeableness was a significant predictor of positive perceptions of touch to both intimate and nonintimate body regions. Openness to experience was also a significant predictor in positive perceptions of touch to nonintimate body regions. Overall, personality was a stronger predictor of positive perceptions of touch than either biological sex or relationship satisfaction with the toucher.     

Stimulus generalization of behavioral history

Undergraduates responded under a variable-ratio 30 schedule in the presence of a 25-mm long line and on a differential-reinforcement-of-low-rate 6-s schedule when a 13-mm long line was present. Following this, a line-length continuum generalization test was administered under a fixed-interval 6-s schedule (Experiment 1) or extinction (Experiment 2). In both experiments, obtained generalization gradients conformed to typical postdiscrimination gradients. Responses were frequent under stimuli physically similar to the 25-mm line and infrequent under stimuli physically similar to the 13-mm line. The generalization gradients were generally asymmetric with peak response rates occurring at line lengths greater than 25 mm.