Time warp: Authorship shapes the perceived timing of actions and events

It has been proposed that inferring personal authorship for an event gives rise to intentional binding, a perceptual illusion in which one’s action and inferred effect seem closer in time than they otherwise would (Haggard, Clark, & Kalogeras, 2002). Using a novel, naturalistic paradigm, we conducted two experiments to test this hypothesis and examine the relationship between binding and self-reported authorship. In both experiments, an important authorship indicator – consistency between one’s action and a subsequent event – was manipulated, and its effects on binding and self-reported authorship were measured. Results showed that action-event consistency enhanced both binding and self-reported authorship, supporting the hypothesis that binding arises from an inference of authorship. At the same time, evidence for a dissociation emerged, with consistency having a more robust effect on self-reports than on binding. Taken together, these results suggest that binding and self-reports reveal different aspects of the sense of authorship.     

Economic pressure in African American families: a replication and extension of the family stress model

This study of 422 two-caregiver African American families, each with a 10-11-year-old focal child (54% girls), evaluated the applicability of the family stress model of economic hardship for understanding economic influences on child development in this population. The findings generally replicated earlier research with European American families. The results showed that economic hardship positively relates to economic pressure in families. Economic pressure was related to the emotional distress of caregivers, which in turn was associated with problems in the caregiver relationship. These problems were related to disrupted parenting practices, which predicted lower positive child adjustment and higher internalizing and externalizing symptoms. The results provide significant support for the family stress model of economic hardship and its generalizability to diverse populations.     

Coordination Between Breathing and Finger Tracking in Man

Arm and leg movements are known to produce temporal pattern changes of breathing. This can be interpreted as coordination, as defined by von Holst (1939). The aim of the present study was to find whether breathing exerts an influence in a reverse direction on a nonrespiratory movement as well. A pursuit tracking test was used, and test individuals (N = 19) were instructed to track a visually presented step function by flexion or extension of their right index finger. Velocity and precision of the step responses proved to be dependent on their relation to the breathing time course; the differences between inspiratory and expiratory responses were smaller than those within each half-cycle. The movements were performed more rapidly and more precisely in about the middle of each half-cycle than immediately after the respiratory phase transition or during the second half of each inspiration or expiration. Discontinuous short-lasting motor actions exerted a coordinative influence on respiration comparablewith that of periodical events: Breaths coinciding with step responses were shortened, preferably when the preset step was given early in the inspiration. It was hypothesized that the reciprocal effect between both motor actions changes periodically. In the first part of each respiratory half-cycle, the respiratory rhythm exerts only a weak influence on additional movements, but it can be altered easily by simultaneous motor processes. Toward the respiratory phase-switching, the respiratory rhythm behaves more stably against coordinative influences and becomes capable of impairing an additional movement.     

The surprisingly low motivational power of future rewards: Comparing conventional money-based measures of discounting with motivation-based measures

Temporal discount rates are often poor predictors of behaviors that we expect will be motivated by the future. The current research suggests this may be because conventional discounting measures are poor measures of the motivational value of future rewards. In six studies, I develop motivation-based measures of the present value (PV) of future rewards and compare the PVs obtained with those obtained using conventional money-based discounting measures. Conventional money-based PVs consistently overestimate motivation-based PVs and are discriminable from them. I explore explanations for this mismatch, including timing of effort exertion (Study 2) and loss aversion (Study 3), both features of the motivation-based measures. In Study 5, I use self-reports of valuation strategies and a time pressure manipulation to demonstrate that participants use different valuation strategies in the conventional money-based and the motivation-based measures that, in part, determine the difference in PVs obtained and the relatively low correspondence between them.     

Michael Wolff über Kant als Logiker. Eine Stellungnahme zu Wolffs Metakritik

In an earlier article (see J Gen Philos Sci (2009) 40: 357–372) I have discussed the arguments brought forward by Michael Wolff against the interpretation given in the commentary by Ebert and Nortmann on Aristotle’s syllogistic theory (Aristoteles Analytica Priora Buch I, übersetzt und erläutert von Theodor Ebert und Ulrich Nortmann. Berlin 2007) and against the critique of Kant’s adaption of the syllogistic logic. I have dealt with Wolff’s arguments concerning (Ebert/Nortmann’s interpretation of) Aristotle in the paper mentioned and with his attempts to defend his critique in this subsequent article (part 1; see J Gen Phils Sci (2010) 41: 215–231). Part 2 (the paper below) is concerned with Wolff’s renewed attempts to defend Kant as a logician. In particular I point out that if, as Wolff claims, the nota notae relation in Kant is restricted to subordinated concepts, then it can hardly serve as a principle for syllogistic logic, as Kant claims. Against Wolff’s attempts to defend Kant’s claim that o-propositions are simpliciter convertible, I point out two arguments: (1) Even if Kant, following the Vernunftlehre by Meier, has assumed that an o-proposition can be turned into an i-proposition, this conversion is useless for the reduction to first figure syllogisms since we are no longer dealing with three syllogistic terms but with four. (2) It is quite unlikely that Kant has a conversion of this type in mind since the texts of his students always talk of the group of either the particular propositions or else of the negative propositions. Given Kant’s mistakes concerning the convertibility simpliciter of o-propositions, it is no wonder that he overlooks the special status of the moods Baroco and Bocardo. Wolff’s attempts to provide Kant with what he claims are direct proofs for these moods can be shown to rely on a reductio ad impossibile. Kant mistook what are parts of the proofs for the validity of moods in figures two to four as parts of these moods themselves. Wolff—who tries to defend Kant on this point—is forced to an artificial and unconvincing reading of the Kantian texts.     

The Effect of a Mindfulness Practice and Dispositional Mindfulness on Affective Forecasting

A field experiment was conducted to evaluate whether mindfulness produces higher affective forecasting accuracy. Participants were randomized into a mindfulness-task, control-task, or baseline condition and then forecasted their positive and negative affect upon completion of an exam and upon receiving the exam grade. They also predicted their exam score. Those in the mindfulness-task condition more accurately predicted positive and negative affect upon exam completion and more accurately predicted negative affect and exam performance upon receiving their actual exam grade. Dispositional mindfulness predicted more accuracy in forecasting negative affect upon exam completion. Results suggest that mindfulness produces higher affective forecasting accuracy, particularly for negative affect. However, evidence was more mixed when considering the dispositional mindfulness results and for positive affect.     

Coordination between breathing and mental grouping of pianistic finger movements

6 pianists (age 22 to 43 years) performed a simple finger exercise at a spontaneously chosen most comfortable tempo on a Yamaha-Disklavier piano. Five versions of the exercise, notated in quarter notes, were presented with different types of meters: (1) 3/4, (2) 4/4, (3) 5/4, (4) 6/4, and (5) 7/4. The onsets of finger strokes were measured while respiration was recorded in parallel by means of a thermistor placed at the front of the dominant nostril. The chosen tempo (finger-beat-rate) was about 3 Hz on all trials but not exactly constant. Correspondingly, the meter-rate chosen was faster for 3/4 and 4/4 meter (around 1 Hz), slower for 5/4, 6/4, and 7/4 meter (around 0.5 Hz). Mean breathing rate while playing the piano (0.38 Hz) was significantly higher than while resting (0.22 Hz, p<.05). Pooling the data of all subjects, the ratios of instantaneous meter and breathing rates clustered around different integer values, depending on the type of meter. Also the individual data indicated integer ratios between instantaneous meter and breathing rates. Even periods of constant phase relations between onsets of the meter and of inspiration could be observed. Thus, the mental process of grouping the same piece of music by various musical meters interacts with unconscious breathing rhythm.