Using saliency maps to separate competing processes in infant visual cognition

This article presents an eye‐tracking study using a novel combination of visual saliency maps and “area‐of‐interest” analyses to explore online feature extraction during category learning in infants. Category learning in 12‐month‐olds (N = 22) involved a transition from looking at high‐saliency image regions to looking at more informative, highly variable object parts. In contrast, 4‐month‐olds (N = 27) exhibited a different pattern displaying a similar decreasing impact of saliency accompanied by a steady focus on the object’s center, indicating that targeted feature extraction during category learning develops across the 1st year of life. These results illustrate how the effects of lower and higher level processes may be disentangled using a combined saliency map and area‐of‐interest analysis.     

Understanding teacher design practices for digital inquiry–based science learning: the case of Go-Lab

Designing and implementing online or digital learning material is a demanding task for teachers. This is even more the case when this material is used for more engaged forms of learning, such as inquiry learning. In this article, we give an informed account of Go-Lab, an ecosystem that supports teachers in creating Inquiry Learning Spaces (ILSs). These ILSs are built around STEM–related online laboratories. Within the Go-Lab ecosystem, teachers can combine these online laboratories with multimedia material and learning apps, which are small applications that support learners in their inquiry learning process. The Go-Lab ecosystem offers teachers ready–made structures, such as a standard inquiry cycle, alternative scenarios or complete ILSs that can be used as they are, but it also allows teachers to configure these structures to create personalized ILSs. For this article, we analyzed data on the design process and structure of 2414 ILSs that were (co)created by teachers and that our usage data suggest have been used in classrooms. Our data show that teachers prefer to start their design from empty templates instead of more domain–related elements, that the makeup of the design team (a single teacher, a group of collaborating teachers, or a mix of teachers and project members) influences key design process characteristics such as time spent designing the ILS and number of actions involved, that the characteristics of the resulting ILSs also depend on the type of design team and that ILSs that are openly shared (i.e., published in a public repository) have different characteristics than those that are kept private.

     

Cross-modality contrast: Exteroceptive context habituation enhances taste neophobia and conditioned taste aversions

The relationship between absolute and relative stimulus novelty was examined within the context of the conditioned taste aversion paradigm in which the relative novelty of the conditioned interoceptive stimulus was manipulated by differential exteroceptive context habituation. Rats received similar isolation histories but either 5 or 30 days of habituation to the test environment prior to treatment. One group was administered lithium chloride following saccharin consumption, a second group was administered isotonic saline following saccharin consumption, and a third group was administered saline after water consumption. The animals habituated for 30 days exhibited greater conditioned avoidance and greater neophobic avoidance of saccharin than did animals habituated for only 5 days. The results are interpreted in terms of a cross-modality stimulus contrast effect which implicates context habituation as an important parameter of both taste neophobia and taste aversion learning.     

Childhood sexual abuse among university students in Tanzania

OBJECTIVES: There are no prevalence data for childhood sexual abuse among Tanzanian university students. This investigation addressed this paucity. The nature of sexual abuse was also investigated. METHOD: Participants (N=487) from a university in Tanzania completed a questionnaire which assessed abusive childhood sexual experiences, gathering information about age of victim, duration of abuse, perpetrators, amount of force or persuasion involved, and potential causes of child sexual abuse. A number of individuals were also interviewed about their experiences. RESULTS: The overall prevalence rate for child sexual abuse was 27.7%, with rates being higher for females than for males. The average age of the victim when abuse occurred was 13.8 years. Perpetrators were generally unidentified by respondents; nonetheless, a surprisingly high proportion of female perpetrators was noted. There was a considerable amount of force or persuasion involved in the abusive behavior: betrayal of trust, bribes and physical force were cited frequently. Poverty and superstition were the primary explanations given for child sexual abuse. CONCLUSION: The study provides evidence for the existence of child sexual abuse in Tanzania. Poverty feeds the "sugar daddy/mammy" phenomenon and combined with various forms of superstition is an important factor in child sexual abuse in Tanzania.