The Role of Sentence Context in Accessing Partial Knowledge of Word Meanings

Two experiments are reported that test the hypothesis that a reader can make use of the size of the semantic domain activated by a sentence context when inferring the meaning of a partially known word. We investigated words at three levels of knowledge: known, frontier, and unknown (e.g., Durso & Shore, 1991). Experiment I demonstrated that participants have knowledge about the meanings of words that they deny are part of the language (the unknown level), and that they make use of relative differences in the size of the semantic domains tapped by two sentences when asked to decide on correct usage of these unknown words. Experiment 2 demonstrated that participants have knowledge about the general semantic constraints operating on their unknown words, even when relative differences in size of semantic domains are controlled. Implications for the role of contextual constraints in vocabulary acquisition are discussed.     

Using elaborative interrogation to facilitate acquisition of factual information in cooperative learning settings: One good strategy deserves another

The primary purpose of this study was to determine whether providing 6th-grade students with cooperative elaborative interrogation instruction would facilitate learning relative to providing them with cooperative learning, elaborative interrogation or reading-for-under-standing instructions. All students were presented with 36 factual statements about six animals. Cooperative elaborative interrogation students were instructed to work collaboratively and use their prior knowledge to state why each fact is true. Cooperative learning students were told to work collaboratively to learn target materials, while elaborative interrogation students were instructed to generate answers to the why questions on their own. Reading-control students were also on their own and instructed to read the animal facts for understanding. For immediate free recall and immediate associative matching tests, students in the experimental conditions outperformed those in the control condition. Cooperative elaborative interrogation and elaborative interrogation students maintained this advantage on a 30-day follow-up associative matching test, with elaborative interrogation students maintaining a significant advantage relative to reading controls on a 60-day associative matching follow-up. (There was also a strong trend favouring the cooperative elaborative interrogation condition on this 60-day measure.) The quality of the ‘why’ answer affected learning: Generating and listening to scientifically correct answers that used relevant prior knowledge to clarify target information was associated with better memory for facts than were other types of study responses. Students in this study learned the most when they were explicitly directed to activate relevant prior knowledge that supports and clarifies new information–processing that occurs following either small-group or individual elaborative interrogation instruction.     

Depressed mothers’ infants show less negative affect during non-contingent interactions

Infants of depressed and non-depressed mothers were videotaped interacting with their mothers in the [Nadel, J., Carchon, I., Kervella, C., Marcelli, D., & Reserbat-Plantey, D. (1999). Report: Expectancies for social contingency in 2-month-olds. Developmental Science, 2, 164–173] paradigm which consists of three segments including: (1) a free play, contingent interaction, (2) a non-contingent replay of the mothers’ behavior that had been videotaped during the first segment, and (3) a return to a free play, contingent interaction. As compared to infants of non-depressed mothers, infants of depressed mothers showed less negative change (less increase in frowning) in their behavior during the non-contingent replay segment. This finding was interpreted as the infants of depressed mothers being more accustomed to non-contingent behavior in their mothers, thus experiencing less violation of expectancy in this situation.     

Poland: Crises in Christian-Jewish Identity

Fifty years after the Holocaust, Jews in various parts of Poland who were raised as Christians are discovering their Jewish identity. Upon disclosing it, they may undergo personal crises. They are required to revise their sense of identity. Support groups conducted by the writer in the United States served as a model for similar groups in Warsaw, Poland. This paper explains the dimensions of this work, provides clinical examples from accounts of the participants, and discusses the problem of Jewish identity from various vantage points.     

Data from eye-tracking corpora as evidence for theories of syntactic processing complexity

We evaluate the predictions of two theories of syntactic processing complexity, dependency locality theory (DLT) and surprisal, against the Dundee Corpus, which contains the eye-tracking record of 10 participants reading 51,000 words of newspaper text. Our results show that DLT integration cost is not a significant predictor of reading times for arbitrary words in the corpus. However, DLT successfully predicts reading times for nouns. We also find evidence for integration cost effects at auxiliaries, not predicted by DLT. For surprisal, we demonstrate that an unlexicalized formulation of surprisal can predict reading times for arbitrary words in the corpus. Comparing DLT integration cost and surprisal, we find that the two measures are uncorrelated, which suggests that a complete theory will need to incorporate both aspects of processing complexity. We conclude that eye-tracking corpora, which provide reading time data for naturally occurring, contextualized sentences, can complement experimental evidence as a basis for theories of processing complexity.     

Different practice effects for males and females by psychometric and chronometric mental-rotation tests

Gender differences in the psychometric mental-rotation test are usually larger than in the chronometric version. In both tests, practice effects appear for males and females. In this study, 104 participants (54 females, 50 males, age: 21.72 years) completed both tests in counterbalanced order. In the chronometric test, only males reacted and rotated significantly faster after the practice with the psychometric test. A strong practice effect independently of gender was found in the psychometric test and a gender difference in accuracy in favour of males. Males reported more confidence and females rated the perceived pressure of the time limit of the psychometric test higher than males. Consequently, differences in confidence after the practice could partly explain the gender differences in the improvements of reaction time and rotational speed. Practice from one mental-rotation test on the performance in another seems to be dependent of participants’ gender and the type of the test.     

Latina Mothers' Perceptions of Mental Health and Mental Health Promotion

Latina mothers' perceptions of mental health and factors that promote/restore mental health were explored in this qualitative study. Participants discussed the importance of community, safety, and financial stability in addition to conventional factors that are related to mental health. Implications for working with urban Latinas and their families are discussed. En este estudio cualitativo se exploraron las percepciones de las madres Latinas sobre Salud Mental y los factores que la fomentan/restablecen. Las participantes discutieron acerca de la importancia de la comunidad, la seguridad y la estabilidad financiera además de otros factores convencionales relacionados con la salud mental. Se discuten las implicaciones para el trabajo con Latinas residentes en núcleos urbanos y sus familias.     

Diminutives facilitate word segmentation in natural speech: Cross-linguistic evidence

Final-syllable invariance is characteristic of diminutives (e.g., doggie), which are a pervasive feature of the child-directed speech registers of many languages. Invariance in word endings has been shown to facilitate word segmentation (Kempe, Brooks, & Gillis, 2005) in an incidental-learning paradigm in which synthesized Dutch pseudonouns were used. To broaden the cross-linguistic evidence for this invariance effect and to increase its ecological validity, adult English speakers (n=276) were exposed to naturally spoken Dutch or Russian pseudonouns presented in sentence contexts. A forced choice test was given to assess target recognition, with foils comprising unfamiliar syllable combinations in Experiments 1 and 2 and syllable combinations straddling word boundaries in Experiment 3. A control group (n=210) received the recognition test with no prior exposure to targets. Recognition performance improved with increasing final-syllable rhyme invariance, with larger increases for the experimental group. This confirms that word ending invariance is a valid segmentation cue in artificial, as well as naturalistic, speech and that diminutives may aid segmentation in a number of languages.     

The extracellular protease matrix metalloproteinase-9 is activated by inhibitory avoidance learning and required for long-term memory

Matrix metalloproteinases (MMPs) are a family of extracellularly acting proteolytic enzymes with well-recognized roles in plasticity and remodeling of synaptic circuits during brain development and following brain injury. However, it is now becoming increasingly apparent that MMPs also function in normal, nonpathological synaptic plasticity of the kind that may underlie learning and memory. Here, we extend this idea by investigating the role and regulation of MMP-9 in an inhibitory avoidance (IA) learning and memory task. We demonstrate that following IA training, protein levels and proteolytic activity of MMP-9 become elevated in hippocampus by 6 h, peak at 12-24 h, then decline to baseline values by approximately 72 h. When MMP function is abrogated by intrahippocampal infusion of a potent gelatinase (MMP-2 and MMP-9) inhibitor 3.5 h following IA training, a time prior to the onset of training-induced elevation in levels, IA memory retention is significantly diminished when tested 1-3 d later. Animals impaired at 3 d exhibit robust IA memory when retrained, suggesting that such impairment is not likely attributed to toxic or other deleterious effects that permanently disrupt hippocampal function. In anesthetized adult rats, the effective distance over which synaptic plasticity is impaired by a single intrahippocampal infusion of the MMP inhibitor of the kind that blocks IA memory is approximately 1200 microm. Taken together, these data suggest that IA training induces a slowly emerging, but subsequently protracted period of MMP-mediated proteolysis critical for enabling long-lasting synaptic modification that underlies long-term memory consolidation.     

Independent retrieval of source dimensions: an extension of results by Starns and Hicks (2005) and a comment on the ACSIM measure

Recently, J. J. Starns and J. L. Hicks (2005) have argued that source dimensions are retrieved independently from memory. In their innovative experiment, manipulating the retrievability of 1 source feature did not affect memory for a 2nd feature. Following C. S. Dodson and A. P. Shimamura (2000), the authors argue that the source memory measure that Starns and Hicks used (known as the average conditional source identification measure) is vulnerable to a response bias in this particular paradigm, and this may undermine Starns and Hicks's conclusion. Starns and Hicks, however, acknowledged this possibility. The authors substantiate this claim by a simulation and by replicating Starns and Hicks's experiment. In 2 further experiments, the authors use an extended multinomial model to analyze data showing that Starns and Hicks's conclusion holds even if results cannot be attributed to response biases.