The effects of early rearing conditions upon responses to mirror-image stimulation in domestic chicks and turkeys

Two experiments were performed in which either White Plymouth Rock chicks or domestic turkeys were reared under three maintenance conditions (with a mirror, with a conspecific, or in visual isolation) from Day 1 posthatch until Day 7. On Day 7, the Ss were given a preference test to determine whether they spent more time before a mirror or with another bird. Ss reared with a mirror spent approximately two-thirds of their time in the vicinity of the mirror, whereas socially reared Ss spent approximately two-thirds of their time with an agemate. The social isolates, on the other hand, failed to show a preference for either mirror image of conspecific stimulation. A third experiment evaluated the choice behavior of turkeys socially reared in the presence of a mirror, and revealed that, like the social isolates, these Ss also failed to exhibit a reliable preference. The results are interpreted in terms of the effects of early rearing conditions upon social stimulus preferences.     

Experience with the reinforcer and the preference for earned rather than free reinforcers in rats

Manipulating experience with the reinforcer, through either home cage presentations of Noyes pellets or availability of the free reinforcer immediately prior to testing, attenuated the preference for earned as opposed to free reinforcers. Similarly, changing the reinforcer to one of a different flavor at testing increased the preference for the noncontingent reinforcer. These results are consistent with an interpretation of earned reinforcer preference which emphasizes the role of the reinforcer as a discriminative signal for further instrumental responding. It is suggested that the tendency to perform instrumental responses for reinforcers when free reinforcers are available can be explained in terms of traditional learning processes.     

Effects of sex and strain on exploratory locomotion and development of nonreinforced maze patrolling

Continuous recording of locomotion in an enclosed maze with no reinforcement other than that intrinsic to ambulation through the maze provided evidence for a dissociation between the efficiency of patrolling the entire maze and locomotor activity. Patrolling efficiency improved with repeated exposure to a single maze or to two similar maze configurations but not with daily presentation of dissimilar mazes. There were only small strain and sex differences in the development of efficient patrolling, whereas locomotor activity was considerably higher in female Roman high-avoidance (RHA) rats than in female Roman low-avoidance rats and higher in RHA female rats than in RHA male rats.     

The development and maintenance of odor-based double-alternation responding under conditions of Thorazine and Elavil injection

Two experiments investigating odor production and utilization in rats under the effects of Thorazine and Elavil injections, respectively, are reported. In Experiment 1, significantly slower speeds shown by the Thorazine-injected subjects indicated that this drug depressed performance. It is felt that depressed performance allowed these subjects to attend and respond to odor cues earlier in Phase 1 than did saline-injected control animals. Reversing the injection conditions (Phase 2) failed to disrupt already-established patterning. During the first phase of Experiment 2, Elavil-injected subjects failed to establish patterned responding, whereas such responding was readily established by saline-injected subjects. Reversing the injection conditions (Phase 2) resulted in the rapid development of double-alternation patterning by the subjects that were shifted from Elavil to saline and in the maintenance of such responding by the animals shifted from saline to Elavil.     

Retrospective and prospective short-term memory in delayed response tasks in rats

Separate groups of rats were trained and tested on asymmetrically and symmetrically reinforced successive delayed matching-to-sample (DMTS) or delayed discrimination (DD) tasks in Experiment 1. Each rat received training and testing on symmetrically reinforced DMTS and DD tasks in Experiment 2. The only difference between each task was that the rats had to respond correctly to a light or tone test stimulus, S₂, if it matched a light or tone sample stimulus, S₁, in DMTS, but could respond to either S₂ if S₁ had been a particular stimulus in DD. Only correct leverpresses were reinforced in the asymmetrically reinforced version of each task. Both correct presses and correct omissions were reinforced in the symmetrically reinforced version of each task. Response biases to leverpress during tests for delayed responding to S₁ were reduced in both symmetrically reinforced tasks, but only in the DD task did such contingencies produce consistently poorer performance in responding to either S, in Experiment 1. Declines in accuracy of performance that occurred in both experiments were greater to the visual than to the auditory S₁ only in the DMTS tasks with increased intervals between S₁ and S₂. A third experiment, in which rats had to respond to S₂ if it matched S₁ (DMTS) or if S₂ mismatched S, (DMmTS), was carried out. Modality of S₁ similarly affected accuracy of delayed responding in each task, as in the first two experiments. Methodological and theoretical implications of these results are discussed in terms of Honig and Thompson’s (1982) dual-process theory of working memory.     

The PISA mathematics regime: knowledge structures and practices of the self

Within mathematics education research, the responses to the Programme for International Student Assessment’s (PISA’s) international testing regime tend to accept its framework and results as necessary points of reference, even when offering a critical reinterpretation or challenging national policy discourses based on PISA. In this article, we offer a different approach to the critique of PISA, drawing on theoretical tools provided by Bernstein and Foucault, to ask what the PISA regime achieves. Our understanding of this achievement encompasses both the production of knowledge structures and the production of students, teachers and other agents as subjects. We propose that the theoretical approach we offer provides a methodological entry point into analysis of the texts comprising the PISA mathematics regime. Analysis of a single PISA item is used to illustrate the insights that may be gained from such a theoretical lens. Such insights into the logic of PISA have the potential to allow us better to understand and hence contest the role that PISA and other large-scale assessment regimes may play in global and local policy discourses.     

Mathematical education versus critical education

This paper concentrates upon the relationship between mathematical education (ME) and critical education (CE) connected with the Frankfurt School and Critical Theory. To make the discussion as precise as possible a distinction is made between three alternatives in ME: Structuralism, pragmatism, and process-orientation. These alternatives are related to the key terms of CE in order to show the extent to which ME and CE contradict each other. The conclusion is that there does not exist any integration — nor even any close relationship-between ME and CE. Finally, this result is discussed in the light of the following two theses:

1. It is necessary to increase the interaction between ME and CE, if ME is not to degenerate into one of the most important ways of socializing students into the technological society and at the same time destroying the possibilities for developing a critical attitude towards precisely this technological society.
2. It is important for CE to interact with subjects from the technical sciences, and among these ME, if CE is not to be taken over by the technological development and fade away into an unimportant and uncritical educational theory.

     

“The Scientific Method” as Myth and Ideal

“The Scientific Method” as it has been portrayed in popular and introductory contexts has been declared a myth. The variation that one finds in introductory presentations of “The Scientific Method” is explained by the fact that there is no canonical account among historians and philosophers of science. What, in particular, is wrong with “The Scientific Method”? This essay provides a fairly comprehensive survey of shortcomings of “The Scientific Method”. Included are corrections to several misconceptions that often accompany such presentations. Rather than treating “The Scientific Method” as a useful approximation or an ideal, the myth should be discarded. Lessons can be learned for introductory pedagogical contexts from considering the shortcomings of the myth.     

Analysing novices analysing Prolog: what stories do novices tell themselves about Prolog?

Informal observations of Prolog learners showed that, despite being presented with correct information and models, students still tended to construct their own idiosyncratic explanations of events, and, characteristically, they defended these ‘stories’ fiercely when tutorial intervention was attempted. Although the stories were often so flawed that the student's future progress was potentially hampered, it was nevertheless true that learning could not have proceeded at all without them. It seems that if we are to understand the novice Prolog programmer, we need to know about these stories, their source, and what, if anything, they have in common from one learner to another. Pain and Bundy (1987) posed the question “What stories should we tell novice Prolog programmers?” in order to teach them Prolog. In our research, we ask: “What stories do novices Prolog programmers tell themselves?” in order to learn Prolog. Observational studies undertaken showed that students used tacit knowledge of human discourse processes both to interpret the language used to communicate with the computer and to interpret the behaviour of the machine. Students did not appreciate the fundamental differences between natural discourse (as takes place amongst humans) and formal discourse (as takes place between humans and machines), and confused elements of the discourse levels. This can be an effective initial learning strategy, but unless its limitations are recognised, programs are inevitably incomplete at some level. Examples from these studies are reported here with illustrative protocol fragments.     

Characteristics of ultrasonic vocalizations emitted by rats during shock-elicited aggression

Albino rats tested for shock-elicited aggression on occasion emitted periodic ultrasonic calls. The fundamental frequency of these calls was about 24 kHz, with harmonics appearing at 72 and 120 kHz, and the calls lasted as long as 3–4 sec. These calls were emitted by rats which had adopted an upright submissive posture following attack(s). These long 22–26-kHz calls may serve to inhibit or prevent unlearned behaviors in rats.     

Conditioned suppression of a VI baseline using a two-bar multiple VI shock-avoidance schedule

Albino rats were trained to respond on a multiple variable-interval (VI) shock-avoidance schedule, where VI responses were reinforced on one bar, and shock-avoidance responses were reinforced on another in alternating components. Tone-shock pairs were superimposed upon the VI components, and conditioned suppression was obtained. These results are in opposition to those obtained when stimulus-shock pairs are superimposed upon baselines in Ss with shock-avoidance histories where a single manipulandum has been used for both schedules.     

Inside information — A door to the future?

Information Technology has the potential to provide virtually any educational requirement which the human mind can imagine. Before ideas can become applications, however, there have to be a suitable infrastructure and detailed procedures, otherwise they merely become historical footnotes. Inside Information, a scheme developed by the B.B.C. and the City and Guilds of London Institute, uses Information Technology in some novel ways and in some new contexts. The linking of it to a short-course programme sponsored by the Department of Education and Science opens up a much wider range of possibilities. The article explains the background to the development of Inside Information and its linking to the Department's short-course programme. It shows how such linking is necessary to enable the potential of the scheme to be realised. Inside Information, as it is now being developed, makes distinctions between formal, nonformal and informal education meaningless for most purposes. Medium- and long-term scenarios are suggested. Exciting as they are, these scenarios cannot become reality until the necessary infrastructure and procedures have been created.     

Effects of interrun interval on serial learning

Two groups of five rats each received a decreasing quantity of food reward, 14-7-3-1-0 .045-g food pellets, over successive runs in a runway. The interrun interval (IRI) separating runs within each of two daily pattern repetitions (trials) was 10 sec (short, S) or 4–5 min (long, L) and varied over four successive phases of training in the order indicated by the group names, that is, Groups SLSS and LLLS. Anticipation of the 0-pellet element developed more rapidly in Group SLSS than in Group LLLS, but did eventually occur at the long IRI. Anticipation was eliminated by the increase in IRI experienced by Group SLSS in Phase 2 and by the decrease in IRI experienced by Group LLLS in Phase 4. The results are discussed with reference to the effects of changes in stimulus context accompanying IRI shifts on retrieval of task-specific knowledge and with reference to the possible signal value established to IRI-specific stimuli.     

Some reflections on thinking skills

This paper and the three which follow it, by Dijkstra, Klauer and Tennyson, are based upon a 1987 symposium of the American Educational Research Association: Metalearning theories and instructional design. This paper discusses the other three papers by posing the question “Are there any thinking skills?”, then considering points that need to be taken into account in arriving at a reasonable answer to this question. It concludes “There is thinking, and there are skills. But-are there any thinking skills?”.     

School-age passwords: C.I.A.

CIA does not stand for what you ordinarily would think, The Central Intelligence Agency! These initials can be quite meaningful to caregivers and definitely beneficial to school-agers who are involved in before and after school care. CIA—Creativity, Imagination and Anticipation! These are key words and functions which can enhance a school-age program.     

Using “Sesame Street” to facilitate children’s recognition of letters and numbers

How can adults who watch “Sesame Street” with children facilitate the children’s recognition of the letters and numbers presented on the show? In order to examine this question, each of 95 preschool children watched three specially edited versions of “Sesame Street” with an adult who either (a) asked the child questions and provided feedback, (b) only asked questions, (c) directed the child’s attention to the screen, or (d) simply watched the shows with the child. Those children in the Questions + Feedback condition and the Questions condition scored significantly higher on a delayed posttest than did children who just watched the shows with an adult. There were no other significant differences among the treatment conditions. Results indicate that adults can increase children’s recognition of letters and numbers presented on “Sesame Street” by asking the children to name the letters and numbers as they are presented. Other interpretations are also discussed.     

Comparative performance in discrimination learning tasks in two New World primates (Saimiri sciureus andCallicebus moloch)

Squirrel monkeys (Saimiri sciureus) and titi monkeys (Callicebus moloch) were tested in three two-choice visual discrimination experiments. Although, on average, squirrel monkeys performed more accurately than titis, the range of response accuracies in the two species overlapped considerably in all three experiments and changes in response accuracy over test sessions and across experiments were similar in the two species. Thus, the species shared several behavioral characteristics expected of New World primates in this setting. Squirrel monkeys’ performance appeared to be more affected than titis’ by task difficulty, and squirrel monkeys were individually less consistent than titis. These differences were associated with higher activity levels and briefer overt attentiveness to the repetitive task in squirrel monkeys and, conversely, with lower activity levels, slower working speeds, and sustained interest in the task in titis. The associated differences are discussed in relation to each species performance in other laboratory settings and the characteristic patterns of foraging and use of space in nature.     

Symptoms of attention-deficit hyperactivity disorder (ADHD) and home learning environment (HLE): findings from a longitudinal study

The concept of “Home Learning Environment” (HLE) covers activities in a family providing intellectual stimulation for a child, such as reading to him or her or visiting libraries. Numerous studies have shown an association between HLE and children's cognitive development. In this longitudinal study, we focus on HLE as a predictor for children's behavioral development, namely, for later symptoms of attention-deficit hyperactivity disorder (ADHD), controlling for relevant aspects like socioeconomic status (SES), or television viewing behavior. We analyzed the development of ADHD symptoms from kindergarten to the end of grade 2 and possible associations with HLE, SES, and television exposure, using a German community sample (N?=?924). Results indicated that ADHD symptoms were negatively and significantly correlated to HLE for all five measurement points as well as to SES (except T4) and to television exposure for T1 to T4. Observing later development, only early HLE but not SES or television exposure served as a significant predictor for ADHD symptoms at school, when age, sex, and ADHD symptoms in kindergarten were controlled for. A structural equation model showed that HLE acted as a mediator between SES and later ADHD symptoms. Our results highlight the importance of the concept of home learning environment also for children's behavioral development. As a consequence, parents should be supported in offering their children a more favorable learning environment.