Monitoring running-wheel movement using a serial mouse and an IBM-compatible system

A running-wheel-movement-detection system is described for use with an IBM-compatible system and a serial mouse. It is an adaptation of a system developed for use on a Commodore 64. The IBM-compatible system provides obvious advantages in speed, memory, data storage, and programming ease over the earlier Commodore 64 system.     

A Pilot Study of Culturally Adapted Cognitive Behavior Therapy for Hispanics with Major Depression

The purpose of this study was to evaluate a culturally adapted cognitive-behavioral treatment (CBT) for major depression among Hispanics in primary care. Cultural adaptations were applied based on a range of cultural considerations described in the literature. Fifteen Hispanic primary care patients with major depression were enrolled. All participants received the 12-session intervention and completed baseline, posttreatment, and 6-month follow-up assessments. Four participants (27%) dropped out of the treatment. Analyses focused on changes from baseline functioning using a Wilcoxon Signed Rank Test. Results showed significant reductions in depressive, anxious, and somatic symptoms at posttreatment and 6-month follow-up. Mean reduction of depressive symptoms at posttreatment was 57%. Findings of acceptable treatment retention rates and clinically meaningful reductions in depressive symptoms showed promise for this intervention to treat Hispanics with major depression. Future studies should conduct a more rigorously controlled evaluation of this intervention.     

The duty to believe according to the evidence

‘Evidentialism’ is the conventional name (given mainly by its opponents) for the view that there is a moral duty to proportion one’s beliefs to evidence, proof or other epistemic justifications for belief. This essay defends evidentialism against objections based on the alleged involuntariness of belief, on the claim that evidentialism assumes a doubtful epistemology, that epistemically unsupported beliefs can be beneficial, that there are significant classes of exceptions to the evidentialist principle, and other shabby evasions and alibis (as I take them to be) for disregarding the duty to believe according to the evidence. Evidentialism is also supported by arguments based on both self-regarding and other-regarding considerations.     

Philosophy—what is to be done?

Philosophical thinking, in the historically original sense, is simply the human mind in operation, unaided by anything supernatural and unfettered by any human authority or any procedure for reaching some pre-given end. This means that “philosophy” originally included far more than it does now, including all the natural sciences, as well as rational reflection on society, history, and art. What this means for us now is that philosophy must be an essentially outward-facing discipline, open to others. Most importantly, it needs now to be open to the sciences, to practical social reflection, and to its own history. But what philosophy brings to all its reflections is above all a spirit of critical reflection, respect for evidence and argument, and a ruthless honesty that demands of people that they form their beliefs and views of life according to the best reasons and information they have, rather than forming their views according to their wishes or prejudices, or letting them be dictated by authorities or social traditions. In this sense, we are living in an unphilosophical, or even anti-philosophical, age, but this makes it all the more important for philosophy to continue to do its work.     

Contextual influences on the internal structure of phonetic categories: A distinction between lexical status and speaking rate

Previous research has shown that phonetic categories have a graded internal structure that is highly dependent on acoustic-phonetic contextual factors, such as speaking rate; these factors alter not only the location of phonetic category boundaries, but also the location of a category’s best exemplars. The purpose of the present investigation, which focused on the voiceless category as specified by voice onset time (VOT), was to determine whether a higher order linguistic contextual factor, lexical status, which is known to alter the location of the voiced—voiceless phonetic category boundary, also alters the location of the best exemplars of the voiceless category. The results indicated that lexical status has a more limited and qualitatively different effect on the category’s best exemplars than does the acousticphonetic factor of speaking rate. This dissociation is discussed in terms of a production-based account in which perceived best exemplars of a category track contextual variation in speech production.     

Cerebellar Substrates for Error Correction in Motor Conditioning

The authors evaluate a mapping of Rescorla and Wagner's (1972) behavioral model of classical conditioning onto the cerebellar substrates for motor reflex learning and illustrate how the limitations of the Rescorla-Wagner model are just as useful as its successes for guiding the development of new psychobiological theories of learning. They postulate that the inhibitory pathway that returns conditioned response information from the cerebellar interpositus nucleus back to the inferior olive is the neural basis for the error correction learning proposed by Rescorla and Wagner (Gluck, Myers, & Thompson, 1994; Thompson, 1986). The authors' cerebellar model expects that behavioral processes described by the Rescorla-Wagner model will be localized within the cerebellum and related brain stem structures, whereas behavioral processes beyond the scope of the Rescorla-Wagner model will depend on extracerebellar structures such as the hippocampus and related cortical regions. Simulations presented here support both implications. Several novel implications of the authors' cerebellar error-correcting model are described including a recent empirical study by Kim, Krupa, and Thompson (1998), who verified that suppressing the putative error correction pathway should interfere with the Kamin (1969) blocking effect, a behavioral manifestation of error correction learning. The authors also discuss the model's implications for understanding the limits of cerebellar contributions to associative learning and how this informs our understanding of hippocampal function in conditioning. This leads to a more integrative view of the neural substrates of conditioning in which the authors' real-time circuit-level model of the cerebellum can be viewed as a generalization of the long-term memory module of Gluck and Myers' (1993) trial-level theory of cerebellar-hippocampal interaction in motor conditioning.