Temporal regularities in speech, such as interdependencies in the timing of speech events, are thought to scaffold early acquisition of the building blocks in speech. By providing on-line clues to the location and duration of upcoming syllables, temporal structure may aid segmentation and clustering of continuous speech into separable units. This hypothesis tacitly assumes that learners exploit predictability in the temporal structure of speech. Existing measures of speech timing tend to focus on first-order regularities among adjacent units, and are overly (...) sensitive to idiosyncrasies in the data they describe. Here, we compare several statistical methods on a sample of 18 languages, testing whether syllable occurrence is predictable over time. Rather than looking for differences between languages, we aim to find across languages (using clearly defined acoustic, rather than orthographic, measures), temporal predictability in the speech signal which could be exploited by a language learner. First, we analyse distributional regularities using two novel techniques: a Bayesian ideal learner analysis, and a simple distributional measure. Second, we model higher-order temporal structure—regularities arising in an ordered series of syllable timings—testing the hypothesis that non-adjacent temporal structures may explain the gap between subjectively-perceived temporal regularities, and the absence of universally-accepted lower-order objective measures. Together, our analyses provide limited evidence for predictability at different time scales, though higher-order predictability is difficult to reliably infer. We conclude that temporal predictability in speech may well arise from a combination of individually weak perceptual cues at multiple structural levels, but is challenging to pinpoint. (shrink)

La gestation pour autrui ( gpa ) est une des méthodes de procréation médicalement assistée qui pose aujourd’hui le plus question. En effet, sa légitimité est discutée tant elle bouscule toutes les représentations classiques de la famille et la parentalité. Afin de mieux comprendre ce phénomène, l’étude reprise dans cet article s’est penchée sur la motivation des mères porteuses à offrir leurs services à un couple souhaitant avoir un enfant en recourant à la gpa. Quatre femmes ont été rencontrées à (...) qui il a été proposé de raconter la manière dont elles ont vécu cette « expérience ». La méthodologie est qualitative et comprend un entretien semi-structuré complété par deux génogrammes. Seront présentés dans cet article les principaux résultats concernant la motivation de la mère porteuse. Deux aspects ont particulièrement retenu l’attention : leur haut niveau d’empathie et la présence d’une dette au fondement de la motivation des mères porteuses. (shrink)

Cluster randomized controlled trials (cluster RCTs) randomize whole clusters of individuals in testing two or more competing interventions. Here we will present the ethical problems raised by cluster RCTs concerning their effect on inequality. We argue that some inequalities generated by cluster RCTs are larger in scope than those generated from individual RCTs. We also argue that any cluster RCT-generated inequalities, which divide groups rather than individuals, are more problematic in type than the inequalities created in individual RCTs. These concerns (...) should be taken into consideration when designing research at the cluster level, and those conducting the research should consider modified research design strategies in cases where they believe the risk of generating inequalities is large. (shrink)

The aim of this article is to examine whether informational manipulation, used intentionally by the researcher to increase recruitment in the research study, can be morally acceptable. We argue that this question is better answered by following a non-normative account, according to which the ethical justifiability of informational manipulation should not be relevant to its definition. The most appropriate criterion by which informational manipulation should be considered as morally acceptable or not is the researcher’s special moral duties towards their subjects. (...) We also propose that a broader definition of manipulation of information should be adopted (than that already existing in the literature) since informational manipulation can affect not only a person’s beliefs but also their desires in decision-making. We conclude that manipulation of information can either be used to protect the potential subject and facilitate the informed consent process or be used to exploit and merely use a person for scientific goals. (shrink)