Are models necessary?

Modelling is currently one of the most successful and popular ways of dealing with some neurotic problems. It is based on a social learning theory that amongst other virtues takes into account cognitive variables. helps shed light on the aetiology of some neurotic disorders (Rachman. 1972). and seems particularly relevant to the understanding of much child behaviour.The technique of the modelling treatment has been refined over the years, largely through the work of Bandura, and the contention to date has been that behavioural improvement is brought about by vicarious processes (Bandura, 1969). However, since a modelling procedure by necessity involves exposure to a phobic object it is possible that vicarious processes are in fact redundant and that improvement is affected by ‘straightforward’ extinction processes. In short the contention is that interaction with a model disguises the fact that the modelling situation is no more than a modified flooding session. In one of the few studies to test this hypothesis Bandura, Grusec and Menlove (1967) found that exposure alone resulted in some gains for dog-phobic children, but that these changes were neither as great nor as stable as those achieved by similar children in a modelling treatment. Other indirect evidence for this hypothesis can be found by-relating the amount of exposure to the phobic object to outcome in modelling studies. Despite obvious difficulties in cross-trial comparison, rate of success for longer exposure treatments would constitute some support, albeit very tentative, for this hypothesis. Unfortunately, few of the studies contained enough reliable information on the relevant variables to reveal much. Bandura et al. (1967) used 80 min of exposure in all, with success rates of 70%, whilst less exposure time resulted in worse outcome in studies by Spiegler et al. (1969) and Ritter (1969). However, against this, Hill et al. (1968) and Rimm and Mahoney (1969) both report good results with brief participant modelling. The fact that participant modelling seems to be more beneficial than symbolic modelling, may be regarded as some support for the exposure hypothesis, since presumably exposure in these cases is more intense.However, these studies are largely indirect and one test of the hypothesis requires a comparison between groups one of which is exposed to both phobic object and model interaction (symbolic modelling) and one of which is exposed just to the phobic object.     

Is there a memory for sentences?

A critical discussion of the model of sentence memory which enjoyed greatest popularity in the psycholinguistic research of the sixties, namely the model based on the deep-structure-plus-tag hypothesis of sentence memory, is presented together with the results of an experiment on prompted recall for sentences with various intervals after presentation and with two types of instructions. This experiment contributed to show that immediate memory for sentences can be affected by appropriate instructions, and that after a short time after presentation only the main semantic information of the sentences is recalled. An alternative model is presented, based on the notion of storage of the meaningful elements of the sentences in a rather abstract form, and of recall as a reconstructive process to produce new sentences. The results of two new experiments on sentence memory, the first a free and prompted recall experiment with children, the second a recognition memory study with adolescents, are then presented and discussed in relation to the model.     

Why are rocks pointy? Children's preference for teleological explanations of the natural world

Teleological explanations are based on the assumption that an object or behavior exists for a purpose. Two studies explored the tendency of adults and first-, second-, and fourth-grade elementary-school children to explain the properties of living and nonliving natural kinds in teleological terms. Consistent with the hypothesis that young children possess a promiscuous teleological tendency, Study 1 found that children were more likely than adults to broadly explain the properties of both living and nonliving natural kinds in teleological terms, although the kinds of functions that they endorsed varied with age. Study 2 was an attempt to reduce children's broad teleological bias by introducing a pretrial that described, in nonteleological terms, the physical process by which nonliving natural kinds form. In spite of this attempt, Study 2 replicated the effects of Study 1, with only fourth graders showing any shift in preference for teleological explanation.     

Inference vs control sentences: are readers able to detect our intended differences?

The reliance of comprehension processes on knowledge to form explanatory inferences has been well established (Grasser, Singer, & Trabasso, 1994), yet the evidence that supports these studies is derived from sentence pairs that are largely unexamined. While some recent studies have suggested that the stimulus sentences utilized in comprehension research need further specification (Shears & Chiarello, 2004), there has been little 'normal reading' data provided that examines what readers are able to detect from traditional inference-requiring vs control sentence pairs. The current study utilized stimuli sentences that have historically been used to support inference research (Singer, 1995) as well as some newly developed sentences, to examine whether readers detect differences between control vs inference conditions, and to further examine whether readers could discern when inference sentences achieved an outcome or goal vs when these sentences did not achieve an outcome or goal.     

Reflections on working memory: are the two models complementary?

By means of the theoretical modeling of data from Kemps, De Rammelaere, and Desmet (2000, this issue), the working memory theory of Baddeley and the theory of constructive operators of Pascual-Leone are contrasted and compared. It is concluded that although the theory of constructive operators is complementary with working memory theory (for it explains developmental and individual differences that working memory theory cannot explain), the converse is not true; the theory of constructive operators explains all the data without need of working memory theory.     

Rules-plus-exception tasks: A problem for exemplar models?

Erickson and Kruschke (2002b) have shown that human subjects generalize category knowledge in a rule-like fashion when exposed to a rule-plus-exception categorization task. This result has remained a challenge to exemplar models of category learning. We show that these models can account for such performance, if they are augmented with exemplar-specific specificity or exemplar-specific attention. This result, however, is only achieved if the choice rule that converts evidence for competing categories into probabilities is sensitive to small differences between evidence values close to 0. Exemplar-specific attention provided the best overall approximation of the data. Exemplar-specific specificity provided a slightly worse approximation, but it predicted better the rule-like generalization pattern observed.     

Is awareness necessary for true inference?

In transitive inference, participants learn a set of context-dependent discriminations that can be organized into a hierarchy that supports inference. Several studies show that inference occurs with or without task awareness. However, some studies assert that without awareness, performance is attributable to pseudoinference. By this account, inference-like performance is achieved by differential stimulus weighting according to the stimuli's proximity to the end items of the hierarchy. We implement an inference task that cannot be based on differential stimulus weighting. The design itself rules out pseudoinference strategies. Success on the task without evidence of deliberative strategies would therefore suggest that true inference can be achieved implicitly. We found that accurate performance on the inference task was not dependent on explicit awareness. The finding is consistent with a growing body of evidence that indicates that forms of learning and memory supporting inference and flexibility do not necessarily depend on task awareness.     

Is neutralization necessary for criminal behavior?

Criminological theories currently place much emphasis on neutralization of norms, i.e., extension or distortion of norms to allow guilt‐free infraction, as a key element in criminal behavior. This paper examines the major assumptions underlying the neutralization thesis and a critical alternative thesis, which argues that criminal beliefs rather than neutralizations permit criminal actions. Analysis of data from a sample of college students calls into question the neutralization theory assumption of homogeneity of moral values in this society. The alternative thesis is supported by the finding of variation in moral values and its link to differential criminal involvement. It is argued that this evidence precludes the need for a concept such as neutralization to account for criminal behavior.     

Choice theories: What are they good for?

Simonson et al. present an ambitious sketch of an integrative theory of context. Provoked by this thoughtful proposal, I discuss what is the function of theories of choice in the coming decades. Traditionally, choice models and theory have attempted to predict choices as a function of the attributes of options. I argue that to be truly useful, they need to generate specific and quantitative predictions of the effect of the choice environment upon choice probability. To do this, we need to focus on rigorously modeling and measuring the underlying processes causing these effects, and use the Simonson et al. proposal to provide some examples. I also present some examples from research in decision-making and decision neuroscience, and argue that models that fail, and fail spectacularly are particularly useful. I close with a challenge: How would consumer researcher aid the design of real world choice environments such as the health exchanges under the Patient Protection and Affordable Care Act?     

Why are conservatives happier than liberals? Comparing different explanations based on system justification,multiple group membership,and positive adjustment

This study examined the relation between conservatism and life satisfaction. Analyses based on data from a representative German survey (ALLBUS 2010) revealed a positive relation between conservatism and self‐reported life satisfaction, thus supporting prior claims of this link. Different accounts have been proposed for this relationship, suggesting system justification, positive adjustment, or multiple group membership as potential mediators. Going beyond prior research, this study allowed for a comparison between these different mechanisms. Analyses revealed that system justification and one of the three examined constructs related to positive adjustment (i.e., religiosity) were significant mediators of the positive relationship between political conservatism and life satisfaction. Comparable results were obtained after controlling for a number of sociodemographic variables. The present findings indicate (i) that conservatives report to be more satisfied with their lives than liberals and (ii) that this difference is in part due to conservatives' system justification and religiosity.     

Predicting recidivism with the Psychopathy Checklist: are factor score composites really necessary?

In two previous studies on general and violent recidivism (Walters & Heilbrun, 2010; Walters, Knight, Grann, & Dahle, 2008), the summed composite antisocial facet of the Psychopathy Checklist displayed incremental validity relative to the other 3 facets (interpersonal, affective, lifestyle), whereas the other 3 facets generally failed to demonstrate incremental validity relative to the antisocial facet. Because summed composite scores do not account for ordinal item distributions, the 6 Walters et al. (2008) samples were reanalyzed with factor score composites derived from a 4-factor confirmatory factor analysis. The results, however, showed little change from what had been obtained earlier with summed composite scores. Two additional samples not previously included in any incremental validity analyses of the Psychopathy Checklist evidenced a 3-factor structure, with the lifestyle and antisocial facets merged into a single factor. This single factor displayed incremental validity relative to the interpersonal and affective facets, but the reverse was not true regardless of whether summed composite scores or factor score composites were used. A comparison of zero-order correlations from all 8 samples revealed that the antisocial summed composite score predicted significantly better than the summed composite scores for the other 3 facets and that a superordinate factor failed to improve on the performance of either the antisocial summed composite score or the antisocial factor score composite.     

Are animal models predictive for humans?

It is one of the central aims of the philosophy of science to elucidate the meanings of scientific terms and also to think critically about their application. The focus of this essay is the scientific term predict and whether there is credible evidence that animal models, especially in toxicology and pathophysiology, can be used to predict human outcomes. Whether animals can be used to predict human response to drugs and other chemicals is apparently a contentious issue. However, when one empirically analyzes animal models using scientific tools they fall far short of being able to predict human responses. This is not surprising considering what we have learned from fields such evolutionary and developmental biology, gene regulation and expression, epigenetics, complexity theory, and comparative genomics.     

Chunking during serial learning by a pigeon: III. What are the necessary conditions for establishing a chunk?

What are the minimal conditions for the formation of chunks by a pigeon learning an arbitrary list? Experiment 1 compared the acquisition of two types of chunkable list (each composed of colors and achromatic geometric forms): A----B----C----D'----E' (or A'----B'----C'----D----E) and A----B----C'----D'----E' (or A'----B'----C----D----E). The first type of list was acquired more rapidly than the second. On both lists, however, evidence of chunking did not emerge until the four-item phase of training (e.g., pauses at the end of one category of list item). In Experiment 2, chunking was shown to occur on four-item lists in which colors and forms were segregated (A----B----C'----D' and A'----B'----C----D), but not on lists in which the two types of items were interspersed (A----B'----C'----D and A'----B----C----D'). As in Experiment 1, evidence of chunking (pauses at chunk boundaries) did not appear until the fourth item was added.     

Is exposure a necessary condition for fear-reduction?

In most of the effective techniques for reducing fear, exposure to the fear-provoking stimulus is a prominent feature. It is argued that in many circumstances, engaged exposure to the fear stimuli is a sufficient condition for fear-reduction, but there is no good reason for supposing that such exposure is a necessary condition for fear-reduction. Seven examples of fear-reduction apparently taking place in the absence of exposure are used to illustrate the argument. Some theoretical and practical consequences of the argument are introduced.     

Selecting explanations from causal chains: Do statistical principles explain preferences for voluntary causes?

We investigate whether people prefer voluntary causes to physical causes in unfolding causal chains and whether statistical (covariation, sufficiency) principles can predict how people select explanations. Experiment 1 shows that while people tend to prefer a proximal (more recent) cause in chains of unfolding physical events, causality is traced through the proximal cause to an underlying distal (less recent) cause when that cause is a human action. Experiment 2 shows that causal preference is more strongly correlated with judgements of sufficiency and conditionalised sufficiency than with covariation or conditionalised covariation. In addition, sufficiency judgements are partial mediators of the effect of type of distal cause (voluntary or physical) on causal preference. The preference for voluntary causes to physical causes corroborates findings from social psychology, cognitive neuroscience and jurisprudence that emphasise the primacy of intentions in causal attribution processes. Copyright © 2009 John Wiley & Sons, Ltd.     

Children's understanding of ambiguous figures: Which cognitive developments are necessary to experience reversal?

In two experiments involving one hundred and thirty-eight 3- to 5-year-olds we examined the claim that a complex understanding of ambiguity is required to experience reversal of ambiguous stimuli [Gopnik, A., & Rosati, A. (2001). Duck or rabbit? Reversing ambiguous figures and understanding ambiguous representations. Developmental Science, 4, 175–183]. In Experiment 1 a novel Production task measured the ability to acknowledge both interpretations of ambiguous figures. This was as easy as and significantly correlated with a False Belief task, and easier than a Droodle task. We replicated this finding in Experiment 2, and also found that perceiving reversal of ambiguous figures was harder than either the False Belief or Production tasks. In contrast to previous findings, the Reversal and Droodle tasks were not specifically related. We conclude that children only attempt reversal once they can understand the representational relationship between the figure and its two interpretations. The process resulting in reversal however is hard, probably requiring additional developments in executive functioning and imagery abilities.     

When are item response models consistent with observed data?

The problem of deciding whether a set of mental test data is consistent with any one of a large class of item response models is considered. The classical assumption of locla independence is weakened to a new condition, local nonnegative dependence (LND). Necessary and sufficient conditions are derived for a LND item response model to fit a set of data. This leads to a condition that a set of data must satisfy if it is to be representable by any item response model that assumes both local independence and monotone item characteristic curves. An example is given to show that LND is strictly weaker than local independence. Thus rejection of LND models implies rejection of all item response models that assume local independence for a given set of data.This research was supported in part by Grant NIE-G-78-0157 to ETS from the NIE, by the Program Statistics Research Project, and by TOEFL Program Research. I would like to thank Dr. Douglas Jones of ETS for stimulating discussions during the early stages of this research, Dr. Frederick Lord of ETS for his encouragement of this work and comments on earlier drafts of this paper and Professor Robert Berk of Rutgers University for pointing out that conditions (a), (b) and (c) of Theorem 2 were also sufficient for LND and Monotonicity. Dr. Donald Alderman of ETS provided financial support for the development of a computer program to apply these results to data from the TOEFL program.     

The Mehrabian measures of achieving tendency: are separate male and female scales necessary?

The 1969 male and female Mehrabian measures of achieving tendency are among the best-known measures of resultant achievement motivation. This study addressed the question of whether unique male and female items are necessary. Pearson product-moment correlation analyses on 83 male and 184 female undergraduates showed that females' scores on the unique male items correlated positively with their scores on the original female scale, and males' scores on the unique female items correlated positively with their scores on the original male scale. Coefficient alpha reliabilities of the original male and female forms were found to be acceptable. Cluster analyses showed that the Mehrabian items cluster in very similar ways for both males and females.     

Septohippocampal acetylcholine: involved in but not necessary for learning and memory?

The neurotransmitter acetylcholine (ACh) has been accorded an important role in supporting learning and memory processes in the hippocampus. Cholinergic activity in the hippocampus is correlated with memory, and restoration of ACh in the hippocampus after disruption of the septohippocampal pathway is sufficient to rescue memory. However, selective ablation of cholinergic septohippocampal projections is largely without effect on hippocampal-dependent learning and memory processes. We consider the evidence underlying each of these statements, and the contradictions they pose for understanding the functional role of hippocampal ACh in memory. We suggest that although hippocampal ACh is involved in memory in the intact brain, it is not necessary for many aspects of hippocampal memory function.