The effects of computer animation on the particulate mental models of college chemistry students

Modern chemistry concepts have the particulate nature of matter at their core. Chemists explain most phenomena in terms of atomic and molecular models. The lack of understanding of chemistry concepts may be linked to the students' inability to build complete mental models that visualize particulate behavior. With computer animation technology, dynamic and three-dimensional presentations are possible. This study explores the effect of computer animations depicting the particulate nature of matter on college students' mental models of the chemical phenomena. A Particulate Nature of Matter Evaluation Test (PNMET) instrument was used to determine the nature of the students' visualizations and, therefore, their comprehension of the chemical concept studied. Animations were used in two treatment situations: (a) as a supplement in large-group lectures, and (b) as both the lecture supplement and an assigned individual activity in a computer laboratory. These two experimental treatments were compared to a control group. Both treatment groups received significantly higher conceptual understanding scores on the PNMET than did the control group. This increased understanding may be due to the superiority of the formation of more expertlike, dynamic mental models of particle behavior in these chemical processes.     

Educational Psychology Early Career Award Winners: How Did They Do It?

Educational Psychology Review -     

Conversations with Five Highly Successful Female Educational Psychologists: Patricia Alexander,Carol Dweck,Jacquelynne Eccles,Mareike Kunter,and Tamara van Gog

Educational Psychology Review - Previous studies have investigated the characteristics, influencing factors, and working strategies of highly successful educational psychologists. These studies,...     

Pupils' perceptions of setting and beyond—a response to Hallam and Ireson

This article examines the important data on pupils' perceptions of setting and mixed‐ability classes in 45 comprehensive schools in England collected by Hallam and Ireson. It is argued that the finding that most pupils prefer setting to mixed‐ability classes requires closer scrutiny and more careful interpretation. The conclusion that such preferences are because setting matches pupils' needs to their abilities is not compelling. Pupils' perceptions may be a product of transmitted ideology and wider cultural and organisational factors inside and outside school. Moreover, it is not clear what the implications of Hallam and Ireson's data on mixed‐ability classes are for mixed‐ability teaching. While, Hallam and Ireson propose more differentiated teaching and learning in mixed‐ability classes, this article contends that their data could be interpreted to imply just the opposite. Finally, the implications of their data for the debate about the nature of comprehensive education in Britain are considered.     

Art Education in Zimbabwe

Art education in Zimbabwe has a rather negative image which dates back to the colonial era. Art was usually confined to wealthy urban schools and taught mostly to white students. The subject was often used as a dumping ground for nonachievers and girls (who had few career options available to them outside of marriage). As a result art was considered an expensive and non‐academic subject in former Rhodesia. The situation did not improve after independence. Art still retains a poor image and has not expanded into mainstream education. However, the country has a rich artistic heritage and informal art education has developed to provide sculptures and crafts for the tourist industry. The government made art compulsory in primary education but have been unable to provide the necessary financial backing to implement the scheme. Only about 80 of the 1548 (5%) schools who have students sitting ‘O’ level examinations offer art as a subject. Third level education has been hindered by the lack of a degree course in art and design, and financial difficulties are again a concern.     

The triad-iodine deficiency,hyperlipidaemia, high coronary risk— in a ‘maternal-neonate’ population of rural Africa

In order to see the pattern of changes in differential serum lipid and lipoprotein fractions as a risk marker of coronary complication in paired ‘maternal—neonate’ blood samples in an iodine deficient zone, 26 pregnant women and their corresponding new born infants at term delivery from the iodine deficient Bassa region of Plateau state, Nigeria were assessed and the results were compared with those seen in a similar 44 group of women and their newborns assessed in non lodine deficient region of Jos. The serum thyroid function and lipid and lipoprotein profiles were determined by ‘ELISA’ and ‘enzymatic’ methods respectively. Urinary iodide excretion level was also measured in 14 pregnant women in Bassa, 23 pregnant women in Jos and 16 non pregnant control from Jos. Results indicate that the pregnant women assessed in Bassa were iodine deficient (P<0.01) and their thyroid status was strikingly reduced as reflected by a drop in serum level of T4/TBG ratio (P<0.01) and a rise in TSH (P<0.005) in comparison to that seen in Jos. There was marked hypertriglyceridaemia and total hypercholesterolaemia (P<0.005), with differential significant rise in LDL cholestotol fraction (P<0.005) in the women assessed in Bassa as compared to Jos. The HDL cholesterol however dropped less significantly in the group (P<0.05) with a concurrent marked rise (P<0.001) in the serum ratio of LDL cholesterol/HDL cholesterol, total cholesterol/HDL cholesterol and triglycerides/HDL cholesterol in the lodine deficient group. A similar pattern of changes were seen in the corresponding neonates in the Bassa group as compared to Jos group. It is concluded that the pregnant women and their newborn offsprings living in a longstanding environmental iodine deficiency run a higher risk of developing coronary complications than those living in non endemic region. It is striking that such newborns surrounded by a continued state of lodine deficient may at a later adult-period of life develop marked risk of coronary complication and other features of hyperlipidaemias associated with varying thyroid insufficiency and accompanied iodine deficiency disorders. Prophylaxis measures as intervention has been highlighted.     

Positivism,Prejudice and Progress in the Sociology of Education: who's afraid of values?

This article is a response to Hammersley's allegations that my discussion of positivism and differentiation‐polarisation theory (d‐p), previously published in this journal, was misguided, incoherent and prejudiced against positivism. I refute those allegations by demonstrating that Hammersley has either misunderstood or misrepresented my position. Furthermore, by revealing inconsistencies in Hammersley's arguments about positivism and d‐p I expose his incoherencies and prejudices regarding the role of political values in social research. Finally and constructively, I suggest that the ‘enlightenment’ aspect of the ‘political arithmetic’ tradition has much to recommend it as a framework for progress in sociology of education.     

Shedding further light on the effects of various types and quality of early child care on infant-mother attachment relationship: the Haifa Study of Early Child Care

The Haifa Study of Early Child Care recruited a large-scale sample (N = 758) that represented the full SES spectrum in Israel, to examine the unique contribution of various child-care-related correlates to infant attachment. After controlling for other potential contributing variables--including mother characteristics, mother-child interaction, mother-father relationship, infant characteristics and development, and the environment--this study found that center-care, in and of itself, adversely increased the likelihood of infants developing insecure attachment to their mothers as compared with infants who were either in maternal care, individual nonparental care with a relative, individual nonparental care with a paid caregiver, or family day-care. The results suggest that it is the poor quality of center-care and the high infant-caregiver ratio that accounted for this increased level of attachment insecurity among center-care infants.