The TeensyTap Framework for Sensorimotor Synchronization Experiments

Synchronizing movements with an external periodic stimulus, such as tapping your foot along with a metronome, is a remarkable human skill called sensorimotor synchronization. A growing body of literature investigates this process, but experiments require collecting responses with high temporal reliability, which often requires specialized hardware. The current article presents and validates TeensyTap, an inexpensive, highly functional framework with excellent timing performance. The framework uses widely available, low-cost hardware and consists of custom-written open-source software and communication protocols. TeensyTap allows running complete experiments through a graphical user interface and can simultaneously present a pacing signal (metronome), measure movements using a force-sensitive resistor, and deliver auditory feedback, with optional experimenter-specified artificial feedback delays. Movement data is communicated to a computer and saved for offline analysis in a format that allows it to be easily imported into spreadsheet programs. The present work also reports a validation experiment showing that timing performance of TeensyTap is highly accurate, ranking it among the gold standard tools available in the field. Metronome pacing signals are presented with millisecond accuracy, feedback sounds are delivered on average 2 ms following the subjects’ taps, and the timing log files produced by the device are unbiased and accurate to within a few milliseconds. The framework allows for a range of experimental questions to be addressed and, since it is open source and transparent, researchers with some technical expertise can easily adapt and extend it to accommodate a host of possible future experiments that have yet to be imagined.     

Warriors,authors and baseball coaches: the meaning of metaphor in theories of family therapy

This article examines the metaphors family therapists use in their theories to reveal aspects of the theories which are not explicitly stated, using Whitaker's symbolic experiential therapy, Minuchin's structural therapy and White's narrative therapy as examples. Such examination, drawing on social constructivist understandings of metaphor and meaning making, reveals that Minuchin's metaphors of family as organism and therapist as artist and warrior emphasize the family as relatively holistic and the therapist as relatively interventionist. In contrast, Whitaker's metaphor of family as ecological system or team and therapist as coach emphasizes the interdependence and context sensitivity of the family and relative powerlessness of the therapist to impose change. Finally, White, reflecting his explicitly post‐structural commitment, uses the metaphor of therapy as a journey undertaken with a map and as therapy as an act of re‐narrating a story.     

Changing Attitudes Toward Older Adults Through a Simulated Aging Exercise: Implications for Family Therapy

Past research suggests that many young people hold negative attitudes toward the elderly. Simulated aging is one method to reduce aging that had been successfully applied with those individuals working in the helping professions. However, it has not yet been applied to ordinary young adults. The current study examined whether a simulated aging activity would cause more positive attitudes toward the aged, an increased desire to help, and higher satisfaction with life. Seventy-eight college students participated; half were randomly assigned to complete three tasks with sensory deficits designed to simulate aging (i.e., wearing non-magnified glasses covered with petroleum jelly, wearing foam earplugs, and wearing cloth gloves), and half served as the control. Three questionnaires were completed that measured attitudes toward older adults, prosocial desires, and satisfaction with life. Results showed that young adults who experienced simulated aging had more favorable attitudes toward older adults than did individuals in the control condition. These results suggest that simulated aging activities may be an effective method to reduce ageism. This has potential implications for multigenerational family therapy, such as to assist younger people to understand what their grandparents may be experiencing.