Gradient form and sequential effects during generalization testing in extinction

Four naive pigeons were given six generalization tests in extinction after periods of pretraining in which S+ appeared with food reinforcement and S? appeared in extinction. An analysis of sequential effects among presentations of test stimuli showed that the overall gradient was influenced differently by stimuli at the extremes of the continuum of test stimuli and by S+ and adjacent stimuli. Gradients consisting of responding in each stimulus when it was preceded by an extreme stimulus tended to peak at S+, while gradients produced when each stimulus was preceded by S+ or an adjacent stimulus tended to show a peak shift. This was true whether the overall gradient showed a peak shift or not. Two naive subjects were added and four additional tests were given after pretraining in which unequal frequencies of reinforcement accompanied both S+ and S?. Results of all 10 tests show that sequential effects occur during generalization testing in extinction and that these “local dimensional effects” are unlike local contrast. These stimulus-specific sequential effects may greatly influence overall gradient form.     

Associations among Attachment Classifications of Mothers, Fathers, and Their Infants

Associations are reported among classifications of Adult Attachment Interviews (AAIs) obtained from expectant parents and subsequent classifications of their infants in the Strange Situation Procedure (SSP). Mothers' AAIs predicted infant-mother SSPs ( X ²= 41.87, N = 96, df = 9, ρ≤ .0001), and fathers' AAIs predicted infant-father SSPs ( X ²= 18.94, N = 90, df = 6, ρ≤ .005). Associations between parents' AAIs and infant-parent SSPs were lessened by the failure to predict the insecure-resistant pattern with mother and the absence of this pattern with father. Counter to expectation, infant-father SSPs were associated with infant-mother SSPs ( X ²= 3.78, N = 90, df = 1, ρ≤ .05), which could not be accounted for in terms of an overlap between parental AAIs. A secondary analysis of the data suggested that this dependency effect of SSPs may be explained by the influence of maternal AAIs upon child-father SSPs. Results are discussed in terms of intergenerational and relationship-specific influences upon attachment during infancy, the possible influence of infant temperament, and the relative influence of mother and father upon the child's evolving representations of attachments within the family.     

Troubling STEM: Making a Case for an Ethics/STEM Partnership

Set against the backdrop of a STEM-based (science, technology, engineering and mathematics) activity in a teacher education science methods class, the author examines the need for ethics education to be partnered with STEM education. To make the case, the origin of the STEM initiative, undertaken and strongly supported by both US government and corporate sources, is briefly recounted. The STSE initiative (science, technology, society and environment) is posited as a counterpoint to STEM. Also considered are: (a) an historical perspective of science and technology as these impact difficult individual and social decision making; (b) STEM knowledge generation considered through the lens of Habermas’ threefold knowledge typology; and (c) the experiences of the teacher candidates working through the STEM activity when an ethical challenge is posed. The author demonstrates the need for a moral component for science education and makes the case for a partnership between STEM and ethics education. Further, such a partnership has been shown to increase student enjoyment and motivation for their science studies. Three possible ethical frameworks are examined for their theoretical and practical utility in a science classroom.     

Book reviews

Educational technology research and development -     

'No Number Can Describe How Good It Was': Assessment issues in the multimodal classroom

Within an outcomes based educational system built on the principles of redress, social justice, multilingualism and multiculturalism, issues of equity in teaching, learning and assessment are increasingly on South Africa's educational agenda. This article locates itself within debates concerning the politics of representation in mainstream classrooms, in which written standard English is the dominant mode and language through which students' meanings are read and assessed. The authors, consisting of English and Art educators, have been implementing forms of 'multimodal pedagogies' in different classrooms in Johannesburg in a move to challenge the existing narrow constraints of representation permitted in mainstream schooling. Through a case study discussion of a multimodal project with disaffected Soweto youth, the authors argue that new criteria for assessment need to be developed in order to address the complexity of thinking about communication as a multiple semiotic practice and students as designers of meaning. Such criteria place human agency and resourcefulness at the centre of meaning-making, and focus on the recruitment of resources, generativity across modes, linkages and connections across modes and genres, voicing of self, community and culture, the processes of making and reflectiveness, as well as taking account of the 'community of arbiters'.     

Serials Librarianship is Still a Business… But Do We like It?

A seasoned collection management librarian explores aspects of job satisfaction in academic librarianship, including following one’s conscience, making good use of abilities, and incorporating outside interests.