Stable population structure in Europe since the Iron Age, despite high mobility

Ancient DNA research in the past decade has revealed that European population structure changed dramatically in the prehistoric period (14,000–3000 years before present, YBP), reflecting the widespread introduction of Neolithic farmer and Bronze Age Steppe ancestries. However, little is known about how population structure changed from the historical period onward (3000 YBP - present). To address this, we collected whole genomes from 204 individuals from Europe and the Mediterranean, many of which are the first historical period genomes from their region (e.g. Armenia and France). We found that most regions show remarkable inter-individual heterogeneity. At least 7% of historical individuals carry ancestry uncommon in the region where they were sampled, some indicating cross-Mediterranean contacts. Despite this high level of mobility, overall population structure across western Eurasia is relatively stable through the historical period up to the present, mirroring geography. We show that, under standard population genetics models with local panmixia, the observed level of dispersal would lead to a collapse of population structure. Persistent population structure thus suggests a lower effective migration rate than indicated by the observed dispersal. We hypothesize that this phenomenon can be explained by extensive transient dispersal arising from drastically improved transportation networks and the Roman Empire’s mobilization of people for trade, labor, and military. This work highlights the utility of ancient DNA in elucidating finer scale human population dynamics in recent history

How does the presenter\u27s physical attractiveness persuade? A test of alternative explanations

This study was conducted to test alternative explanations for the powerful positive effect of the presenter’s facial attractiveness on persuasion found by Patzer (1985). The explanations tested are: (a) a “conscious Patzer effect” whereby the attractiveness of the presenter prompts conscious cognitive-response inferences about the presenter’s expertise and trustworthiness; (b) a “subconscious Patzer effect” whereby attractiveness persuades via beliefs about the presenter’s expertise and trustworthiness but without conscious cognitive responses; (c) an “affect transfer effect” whereby attractiveness increases liking of the presenter which in turn transfers to a more favorable attitude toward the brand; and (d) a “role-model identification effect” whereby attractiveness increases identification

Physically attractive presenters and persuasion: an experimental investigation of alternative explanations for the Patzer effect

This experiment was designed to test alternative explanations for the powerful positive effect of the presenter’s facial attractiveness on persuasion found by Patzer (1985). The explanations tested are: (a) a “conscious Patzer effect” whereby the attractiveness of the presenter prompts conscious cognitive-response inferences about the presenter’s expertise and trustworthiness; (b) a “subconscious Patzer effect” whereby attractiveness persuades via beliefs about the presenter’s expertise and trustworthiness but without conscious cognitive responses; (c) an “affect transfer effect” whereby attractiveness increases liking of the presenter which in turn transfers to a more favorable attitude toward the brand; and (d) a “role-model identification effect” whereby attractiveness increases identification

Cross-Cultural Differences in the Effect of Received Word-of-Mouth Referral in Relational Service Exchange

Contains fulltext : 123994.pdf (publisher's version ) (Open Access)19 p

Cross-cultural differences in the effects of word-of-mouth in relational service exchange : Empirical evidence for the moderating role of uncertainty avoidance from an eight country study

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