Evidence that nonconscious processes are sufficient to produce false memories

Are nonconscious processes sufficient to cause false memories of a nonstudied event? To investigate this issue, we controlled and measured conscious processing in the DRM task, in which studying associates (e.g., bed, rest, awake...) causes false memories of nonstudied associates (e.g., sleep). During the study phase, subjects studied visually masked associates at extremely rapid rates, followed by immediate recall. After this initial phase, nonstudied test words were rapidly presented for perceptual identification, followed by recognition memory judgments. On the perceptual identification task, we found significant priming of nonstudied associates, relative to control words. We also found significant false recognition of these nonstudied associates, even when subjects did not recall this word at study or identify it at test, indicating that nonconscious processes can cause false recognition. These recognition effects were found immediately after studying each list of associates, but not on a delayed test that occurred after the presentation of several intervening lists. Nonconscious processes are sufficient to cause this memory illusion on immediate tests, but may be insufficient for more vivid and lasting false memories.     

Cómo el niño construye hipótesis sobre la gramática de su lengua

Resumen

El «Paradigma de los Recados», procedimiento experimental en el que un adulto incita al niño a transmitir un recado a otro adulto, es aplicado a una muestra de 36 niños franceses comprendidos entre los 2 y los 3,6 años con el propósito de elicitar la construcción de frases. A partir de las omisiones, errores y otras conductas lingüísticas peculiares que producen estos niños, se infieren las estratégias transitorias para abordar los problemas que la expresión del sujeto plantea en esta lengua. Estas estratégias guían hacia la construcción de hipótesis sobre la gramática del modelo adulto. Ambas dan cuenta de la evolución desde la categorización semántico-pragmática a la categorización sintáctica sin acudir a la intervención de principios lingüísticos innatos. En lo que respecta a la categoría de sujeto, se cuestiona la existencia de una primitiva y universal gramática pro-drop.     

Essentialism and the expression of social stereotypes: a comparative study of Spain, Brasil and England

Over the past few years, one of the most productive directions in the study of the activation and application of stereotypes has been provided by the essentialist concept of categorization. The research presented here studied the impact of two dimensions of essentialist beliefs--naturalism and entitativity-by using data collected from Brazil, Spain and England. The aim was to test whether there was a greater degree of essentialization among the naturalizable categories (sex, age and race) than among the entitative categories (economic condition, religion, political orientation, nationality and social condition). The results not only showed that participants hold more essentialist beliefs with regard to naturalistic categories but also showed the differences in the degree of essentialization across the three cultures. A discussion is conducted on the implications of the present findings, and on the heuristic value of the theoretical model (of the bidimensional nature of essentialism) adopted by this research.     

Are nonconscious processes sufficient to produce false memories?

Seamon, Luo, and Gallo (1998) reported evidence that nonconscious processes could produce false recognition in a converging-associates task, whereby subjects falsely remember a nonstudied lure (e.g., sleep) after studying a list of related words (bed, rest, awake...). Zeelenberg, Plomp, and Raaijmakers (2003) failed to observe this false recognition effect when list word recognition was at chance. We critically evaluate the evidence for nonsconscious processing and report the results of a new experiment designed to overcome previous methodological limitations. Consistent with Seamon et al., we found that conscious activation of a related lure during study was not necessary for its subsequent recognition; consistent with Zeelenberg et al., we found no evidence for recognition of related lures under conditions where there was no memory for studied words. It is currently unknown whether conscious recollection of the studied items is necessary for false recognition or if nonconscious activation of the lure is sufficient.     

Automatic activation of phonological information in reading: Evidence from the semantic relatedness decision task

A semantic relatedness decision task was used to investigate whether phonological recoding occurs automatically and whether it mediates lexical access in visual word recognition and reading. In this task, subjects read a pair of words and decided whether they were related or unrelated in meaning. In Experiment 1, unrelated word-homophone pairs (e.g., LION-BARE) and their visual controls (e.g., LION-BEAN) as well as related word pairs (e.g., FISH-NET) were presented. Homophone pairs were more likely to be judged as related or more slowly rejected as unrelated than their control pairs, suggesting phonological access of word meanings. In Experiment 2, word-pseudohomophone pairs (e.g., TABLE-CHARE) and their visual controls (e.g., TABLE-CHARK) as well as related and unrelated word pairs were presented. Pseudohomophone pairs were more likely to be judged as related or more slowly rejected as unrelated than their control pairs, again suggesting automatic phonological recoding in reading.     

Illusory recollection of voices

We investigated source misattributions in the DRM false memory paradigm (Deese, 1959, Roediger & McDermott, 1995). Subjects studied words in one of two voices, manipulated between‐lists (pure‐voice lists) or within‐list (mixed‐voice lists), and were subsequently given a recognition test with voice‐attribution judgements. Experiments 1 and 2 used visual tests. With pure‐voice lists (Experiment 1), subjects frequently attributed related lures to the corresponding study voice, despite having the option to not respond. Further, these erroneous attributions remained high with mixed‐voice lists (Experiment 2). Thus, even when their related lists were not associated with a particular voice, subjects misattributed the lures to one of the voices. Attributions for studied items were fairly accurate in both cases. Experiments 3 and 4 used auditory tests. With pure‐voice lists (Experiment 3), subjects frequently attributed related lures and studied items to the corresponding study voice, regardless of the test voice. In contrast, with mixed‐voice lists (Experiment 4), subjects frequently attributed related lures and studied items to the corresponding test voice, regardless of the study voice. These findings indicate that source attributions can be sensitive to voice information provided either at study or at test, even though this information is irrelevant for related lures.     

Typology of violence derived from ratings of severity and provocation

Two exploratory studies examined ratings of the severity of violence of several behaviors. In Study 1, a very consistent ordering of the behaviors by severity was obtained from two groups of participants. The stated justification for the behaviors was manipulated, and both mitigation and aggravation effects were observed. Study 2 found that essentially the same ordering of behaviors could be obtained in a provocation-rating task, and that both the severity ratings and the provocation ratings yielded four interpretable types of violence upon factor analysis: more severe physical (V1), less severe physical (V2), more severe nonphysical (V3), and less severe nonphysical (V4). Individual profiles of severity ratings across these four types yielded two interpretable groupings of participants upon cluster analysis: a violence-sensitive group and a violence-tolerant group. The violence-tolerant group had lower severity ratings for three of the four types of violence. These empirical distinctions help to illuminate what appear to be different meanings of the term violent for different behavior categories and for different individuals.     

Encoding modality can affect memory accuracy via retrieval orientation

Research indicates that false memory is lower following visual than auditory study, potentially because visual information is more distinctive. In the present study we tested the extent to which retrieval orientation can cause a modality effect on memory accuracy. Participants studied unrelated words in different modalities, followed by criterial recollection tests that selectively oriented retrieval toward one study modality at a time. Memory errors were lower when oriented toward visual than toward auditory information, thereby generalizing the modality effect to an explicit source memory task. Moreover, these effects persisted independent of the test presentation modality, indicating that retrieval orientation overrode the potential cuing properties of the test stimulus. An independent manipulation check confirmed that visual recollections were subjectively experienced as more distinctive than auditory recollections. These results suggest that retrieval orientation is sufficient to cause a modality effect on memory accuracy by focusing monitoring processes on the recollection of studied features that are diagnostic of prior presentation.