The perceptual basis of the modality effect in multimedia learning

Various studies have demonstrated an advantage of auditory over visual text modality when learning with texts and pictures. To explain this modality effect, two complementary assumptions are proposed by cognitive theories of multimedia learning: first, the visuospatial load hypothesis, which explains the modality effect in terms of visuospatial working memory overload in the visual text condition; and second, the temporal contiguity assumption, according to which the modality effect occurs because solely auditory texts and pictures can be attended to simultaneously. The latter explanation applies only to simultaneous presentation, the former to both simultaneous and sequential presentation. This paper introduces a third explanation, according to which parts of the modality effect are due to early, sensory processes. This account predicts that-for texts longer than one sentence-the modality effect with sequential presentation is restricted to the information presented most recently. Two multimedia experiments tested the influence of text modality across three different conditions: simultaneous presentation of texts and pictures versus sequential presentation versus presentation of text only. Text comprehension and picture recognition served as dependent variables. An advantage for auditory texts was restricted to the most recent text information and occurred under all presentation conditions. With picture recognition, the modality effect was restricted to the simultaneous condition. These findings clearly support the idea that the modality effect can be attributed to early processes in perception and sensory memory rather than to a working memory bottleneck.     

The Roles We Make Others Take: Thoughts on the Ethics of Arguing

Feminist argumentation theorists have criticized the Dominant Adversarial Model in argumentation, according to which arguers should take proponent and opponent roles and argue against one another. The model is deficient because it creates disadvantages for feminine gendered persons in a way that causes significant epistemic and practical harms. In this paper, I argue that the problem that these critics have pointed out can be generalized: whenever an arguer is given a role in the argument the associated tasks and norms of which she cannot fulfill, she is liable to suffer morally significant harms. One way to react to this problem is by requiring arguers to set up argument structures and allocate roles so that the argument will be reasons-reflective in as balanced a way as possible. However, I argue that this would create to heavy a burden. Arguers would then habitually have to take on roles that require them to divert time and energy away from the goals that they started arguing for and instead serve the goal of ideal reasons-reflectiveness. At least prima facie arguers should be able to legitimately devote their time and energy towards their own goals. This creates a problem: On the one hand, structures that create morally significant harms for some arguers should be avoided—on the other hand, arguers should be able to take argument-roles that allow them to devote themselves to their own argumentative goals. Fulfilling the second requirement for some arguers will often create the morally significant harms for their interlocutors. There are two possible solutions for this problem: first, arguers might be required to reach free, consensual agreements on the structure they will adopt for their argument and the way they will distribute argumentative roles. I reject this option as both fundamentally unfeasible and practically unrealistic, based on arguments developed by theorists like Krabbe and Jacobs. I argue that instead, we should take a liberal view on argument ethics. Arguers should abide by moral side constraints to their role taking. They should feel free to take roles that will allow them to concentrate on their argumentative goals, but only if this does not create a situation in which their interlocutors are pushed into a role that that they cannot effectively play.

     

Do salespeople matter in competitive tenders?

Abstract

Organizational buyers are increasingly employing competitive tenders with objective buying criteria to mitigate the influence of personal relationships with suppliers and reduce the overall cost of buying. This paper investigates the role of salespeople’s relationships with buyers (i.e., purchasing managers) and how they affect supplier selection in such contexts. Drawing on data from 428 tenders across different buying organizations, this study shows that the quality of the salesperson’s relationship with the buyer influences the buyer’s evaluation of the tender proposal, which, in turn, affects supplier selection. Thus, the results support an indirect effect of salesperson relationship on supplier selection even in a tender context. In addition, the results indicate that the effect of a salesperson’s relationship on buyer’s proposal evaluation is contingent on the comprehensibility of suppliers’ proposals and buyer’s product knowledge. These results have significant theoretical and managerial implications for both buyers and suppliers in business-to-business (B2B) tender contexts.     

What Is Conventionalism about Moral Rights and Duties?

A powerful objection against moral conventionalism says that it gives the wrong reasons for individual rights and duties. The reason why I must not break my promise to you, for example, should lie in the damage to you—rather than to the practice of promising or to all other participants in that practice. Common targets of this objection include the theories of Hobbes, Gauthier, Hooker, Binmore, and Rawls. I argue that (1) the conventionalism of these theories is superficial; (2) genuinely conventionalist theories are not vulnerable to the objection; and (3) genuine moral conventionalism is independently plausible.     

Understanding attention: 12- and 18-month-olds know what is new for other persons

Infants at 12 and 18 months of age played with 2 adults and 2 new toys. For a 3rd toy, however, 1 of the adults left the room while the child and the other adult played with it. This adult then returned, looked at all 3 toys aligned on a tray, showed great excitement ("Wow! Cool!"), and then asked, "Can you give it to me?' To retrieve the toy the adult wanted, infants had to (a) know that people attend to and get excited about new things and (b) identify what was new for the adult even though it was not new for them. Infants at both ages did this successfully, lending support to the hypothesis that 1-year-old infants possess a genuine understanding of other persons as intentional and attentional agents.     

Does morphology make the difference? Agrammatic sentence comprehension in German

This study examines the syntactic comprehension of seven German agrammatic speakers. The German language allows the study of the interaction of syntactic principles and morphological devices in the comprehension process. In addition, due to its relatively free word order, German allows the study of strictly minimal pairs of canonical and non-canonical sentences in addition to the rather controversial active-passive contrast. A central research question was whether the pattern of agrammatic comprehension predicted by the trace deletion hypothesis (TDH, Grodzinsky, 1990, 1995), relatively normal comprehension performance of canonical sentences and chance performance on non-canonical sentences, can be found in a language with richer morphology than English. The generalisability of the TDH-pattern to morphologically rich languages is not obvious, given that case morphology in particular can provide explicit cues to the detection of the agent and patient roles in a sentence. The results of this study indicate that morphology does not make a difference. Furthermore, the group results are in line with the TDH-predictions only for number marked sentences but not for case marked sentences. However, single case analysis reveals different patterns of syntactic comprehension in agrammatic patients, a spectrum that encompasses near-normal comprehension of canonical and non-canonical sentences, overall chance performance, and TDH-like profiles.     

Does zebra finch (Taeniopygia guttata) preference for the (familiar) father's song generalize to the songs of unfamiliar brothers?

Several studies have demonstrated that zebra finches (Taeniopygia guttata) prefer their fathers' songs over unfamiliar songs. Songs of tutors (i.e., fathers) and tutees (i.e., sons) resemble each other as a result of cultural transmission. Subjects (N = 18) with a previously established preference for the father's song could choose between the song of an unfamiliar brother or a random unfamiliar song in an operant task. Most subjects showed a significant preference for either category of song, but overall, the songs of unfamiliar brothers were not preferred, although they were more similar to the father's song than were the unfamiliar songs. This suggests that subjects did not generalize their learned preference for a song of a particular tutor to the songs of his tutees.     

Ethnic Speech and Ethnic Action as Ethnic Behavior: Part 1. Construction of the Brunel Ethnic Behavior Inventory

This article reports the construction of a new survey—specifically, the Brunel Ethnic Behavior Inventory (BEBI)—designed to measure ethnic speech and ethnic action as separate, yet related, aspects of individuals’ ethnic behavior. Using Tajfel’s social identity theory as a conceptual frame of reference, this study sought an answer to the research question of how many factors actually are measured by the BEBI, and tested the hypothesis that a two-factor model (i.e., Ethnic Speech and Ethnic Action as two correlated factors) would provide significantly better goodness of fit to the correlational data than would a one-factor model (i.e., Ethnic Behavior as one undifferentiated factor). Across one pilot sample (n = 101) and two main samples (n = 120 for Sample 1, n = 148 for Sample 2), the study found that not only did the BEBI measure two factors at most (i.e., Ethnic Speech and Ethnic Action) but, consistent with the hypothesis, the two-factor model yielded better goodness of fit than did the one-factor model. Implications for the conceptualization and measurement of Verkuyten’s “ways of ethnicity” are discussed.     

Adolescents in conflict: Intercultural contact attitudes of immigrant mothers and adolescents as predictors of family conflicts

Recent research demonstrates that intergenerational differences in immigrant families' adaptation can be detrimental for family functioning. However, most of the findings originate from immigrant groups in North America who face different situations compared with European Diaspora returnees. This comparative study investigated whether ethnic German Diaspora immigrant adolescents' and mothers' disagreement about the desirability of adolescents' intercultural contact with native peers relates to more conflict in the family domain. In addition, we accounted for general developmental factors predicting family conflict by considering adolescents' background in terms of prosocial behaviour and hyperactivity. Participants comprised 185 Diaspora immigrant mother–adolescent dyads from the former Soviet Union living in Germany (adolescents: mean age 15.7 years, 60% female) and 197 native German mother–adolescent dyads (adolescents: mean age 14.7 years, 53% female). Results indicated a similar level of family conflict in immigrant and native families. However, conflict was elevated in those immigrant families disagreeing on intercultural contact attitudes, independent of the significant effects of adolescents' background of prosocial behaviour or hyperactivity. Our study highlights potential side effects in the family domain, if immigrant adolescents and parents disagree in their attitude regarding adaptation to the host culture's life domains, such as contact with native peers.