Number of Judges when Scaling Attitude Items

Sjödahl, L. 1974. Number of Judges when Scaling Attitude Items. Scand. J. educ. Res. 18, 183‐197. When constructing attitude scales for measuring patient‐centering among student nurses the author has carried out a series of studies of the method of attitude scale formation. The article presents one of several methodological studies published by the same author in Ped. psyk. problem (nr. 184). Scale values, interquartile range, interval position and the selection of items for the final scale are studied as dependent variables when varying the size of the judging group. The results show that correlations between series of scale values from judging groups of varying sizes can be very high but that we can still get quite a different selection of items for the final scale, depending upon which judging group we use in the scaling procedure. The stability of the interval placements of the statements is shown to vary with the intervals along the scale.     

Losing All Interest in School: Social Participation as a Predictor of the Intention to Leave Upper Secondary School Early

Early school leaving in upper secondary education is a serious problem for both students and society. Several reviews have shown that there is no simple cause of early school leaving, but it seems to relate to demographic variables, social factors, academic achievement, and school factors. In this study, data from 2,045 students aged 16 from upper secondary schools in Norway were analyzed using a hierarchical regression model. Their intention to leave school was the dependent variable. Our analyses found that teacher support and loneliness in the school context were strong predictors of such intension. The effects of peer acceptance and friendship were minimal.     

Analyzing effective communication in mathematics group work: The role of visual mediators and technical terms

Analyzing and designing productive group work and effective communication constitute ongoing research interests in mathematics education. In this article we contribute to this research by using and developing a newly introduced analytical approach for examining effective communication within group work in mathematics education. By using data from 12 to 13-year old students playing a dice game as well as from a group of university students working with a proof by induction, the article shows how the link between visual mediators and technical terms is crucial in students’ attempts to communicate effectively. The critical evaluation of visual mediators and technical terms, and of links between them, is useful for researchers interested in analyzing effective communication and designing environments providing opportunities for students to learn mathematics.     

Knee angular displacement and extensor muscle activity in telemark skiing and in ski-specific strength exercises

Much of the training of competitive telemark skiers is performed as dry-land exercises. The specificity of these exercises is important for optimizing the training effect. Our aim here was to study the activation of the knee extensor musculature and knee angular displacement during competitive telemark skiing and during dry-land strength training exercises to determine the specificity of the latter. Specificity was analysed with respect to angular amplitude, angular velocity, muscle action and electromyographic (EMG) activity. Five male telemark skiers of national and international standard volunteered to participate in the study, which consisted of two parts: (1) skiing a telemark ski course and (2) specific dry-land strength training exercises for telemark skiing (telemark jumps and barbell squats). The angular displacement of the right knee joint was recorded with an electrogoniometer. A tape pressure sensor was used to measure pressure between the sole of the foot and the bottom of the right ski boot. Electromyographic activity in the right vastus lateralis was recorded with surface electrodes. The EMG activity recorded during maximum countermovement jumps was used to normalize the EMG activity during telemark skiing, telemark jumps and barbell squats. The results showed that knee angular displacement during telemark skiing and dry-land telemark jumps had four distinct phases: a flexion (F1) and extension (E1) phase during the thrust phase of the outside ski/leg in the turn/jump and a flexion (F2) and extension (E2) phase when the leg was on the inside of the turn/jump. The vastus lateralis muscle was activated during F1 and E1 in the thrust phase during telemark skiing and telemark jumps. The overall net knee angular amplitude was significantly greater (P<0.05) for telemark jumps than for telemark skiing. Barbell squats showed a knee angular amplitude significantly greater than that in telemark skiing (P<0.05). The mean knee angular velocity of the F1 and E1 phases during telemark skiing was about 0.47 rad?·?s^?1; during barbell squats, it was about 1.22 rad?·?s^?1. The angular velocity during telemark jumps was 2.34 and 1.59 rad?·?s^?1 in the F1 and E1 phase, respectively. The normalized activation level of the EMG bursts during telemark skiing, telemark jumps and barbell squats was 70–80%. In conclusion, the muscle action and level of activation in the vastus lateralis during the F1 and E1 phases were similar during telemark skiing and dry-land exercises. However, the dry-land exercises showed a larger knee extension and flexion amplitude and angular velocity compared with telemark skiing. It appears that an adjustment of knee angular velocity during barbell squats and an adjustment of knee angle amplitude during both telemark jumps and barbell squats will improve specificity during training.     

Cross‐Country Skiing

The purpose was to study the adaptation to speed in the temporal patterns of the movement cycle and determine any differences in velocity, cycle rate and cycle length at the maximum speed level in the different classical style and freestyle cross‐country skiing techniques. Eight skilled male cross‐country skiers were filmed with a digital video camera in the sagittal plane while skiing on a flat cross‐country ski track. The skiers performed three classical style techniques the diagonal stride, kick double poling and the double poling technique and four freestyle techniques paddle dance (gear 2), double dance (gear 3), single dance (gear 4) and combiskate (gear 5) at four different self‐selected speed levels slow, medium, fast and their maximum. Cycle duration, cycle rate, cycle length, and relative and absolute cycle phase duration of the different techniques at the different speed levels were analysed by means of a video analysis system. The cycle rate in all tested classical and freestyle techniques was found to increase significantly (p < .01) with speed from slow to maximum. Simultaneously, there was a significant decrease in the absolute phase durations of all the investigated skiing techniques. A minor, not significant, change in cycle length, and the significant increase in cycle rate with speed showed that the classical and freestyle cross‐country skiing styles are dependent, to a large extent, on an increase in cycle rate for speed adaptation. A striking finding was the constant relative phase duration with speed, which indicates a simplified neural control of the speed adaptation in both cross‐country skiing styles. For the practitioner, the knowledge about the importance of increasing cycle frequency rather than cycle length in the speed adaptation can be used to optimise a rapid increase in speed. The knowledge about the decrease in absolute phase duration, especially the thrust phase duration, points to the need for strength and technique training to enable force production at a high cycle rate and skiing speed. The knowledge that the relative phase duration stays constant with speed may be used to simplify the learning of the different cross‐country skiing techniques.     

Lab Work and Learning in Secondary School Chemistry: The Importance of Teacher and Student Interaction

Laboratory work is considered essential in promoting students’ learning of science and of scientific inquiry. What the students perceive as important to learn from a regular laboratory exercise is probably affected by the teacher’s objectives. We study the extent to which one teacher’s objectives are fulfilled during lab work, and how teacher–student and student–student interactions contribute to developing learning experiences from the laboratory exercise. Do students encounter opportunities to learn in agreement with the teacher’s objectives? This explanatory single case study includes use of a palette of methods, such as pre- and post-interviews, observations and video documentation from an experienced secondary school teacher and her 8th grade (aged 13–14) students’ laboratory work. Our results point to the importance of teacher involvement to help students understand what to look for, how to do it and why. Especially teacher–student interactions during lab work seemed to influence what students perceived as important to learn. In the laboratory exercise in this case, the teacher helped the students to observe and to use their observations in their explanations. The lab work included learning experiences other than those addressed by the teacher, and the teacher’s intentions were partially fulfilled. Not only what the teacher says, but also how the teacher acts is important to help students understand what to learn from a laboratory exercise.     

Recognising Prior Learning: Understanding the Relations Among Experience, Learning and Recognition from a Constructivist Perspective

This article discusses the relation between experience and learning in the context of recognition of prior learning (RPL) and from an experiential constructivist perspective. The study is based on a case of in-service training, based on RPL, in the care sector for elderly people. The data consist of interviews with actors in this process, which have been analysed with a qualitative interpretative approach. The results show how prior learning plays a central role in the training process, both on an individual and a collective level. The participants’ prior learning is taken as the starting point, particularly in learning conversations where prior learning is made visible and used, and where participants learn from each other. Further, new learning is taking place as a consequence of the recognition process, and the study particularly highlights how prior experiences could be the basis of new learning in a process of reflection and discussion.     

Questioning two myths in innovation literature

Which knowledge is most important in the completion of innovative processes? In which contexts does such knowledge develop? The combination of an in-depth case study, theory and reasoning formed the platform from which conclusions could be drawn. One conclusion is that the strategic knowledge necessary for innovation not only concerns technology. It is rather about business intelligence, funding, marketing and other non-technical areas. Moreover, the production and development of frontline knowledge and research is not the sole province of universities. In many areas, companies are far ahead of universities. Both conclusions differ from the assumptions in mainstream innovation literature.     

Pole length and ground reaction forces during maximal double poling in skiing

The purpose of the investigation was to study the relationship between thrust phase duration, ground reaction force, velocity increase after pole thrust and pole angles versus pole length during double poling in roller skiing. Seven male regional elite cross-country skiers volunteered as subjects for the study. The subjects performed a maximal double pole thrust on roller skis with each of the three different pole lengths: 'short', self-selected (normal) and 'long'. The short and long poles were 7.5 cm shorter and 7.5 cm longer than the self-selected pole length. The subjects made seven maximal pole thrusts with each pole length, which were randomly selected during 21 trials. For each trial the subjects accelerated from a 1.2 m high downhill slope attaining a speed of 3.92 m.s-1 before making a maximal double pole thrust on a force plate placed at the bottom of the slope. The vertical (F2), anterior-posterior (Fy) and mediolateral (Fx) reaction forces of the left pole were measured by the force plate. The positions of the pole were recorded in 3-D by an opto-electronic system. Thrust phase duration, impulse, mean force, velocity increase after pole thrust and pole angles were calculated from the recorded data. Double poling with long poles produced a significantly larger propulsive anterior-posterior reaction force impulse and velocity increase than normal (p < .05) and short poles (p < .05). This was in spite of a larger mean anterior-posterior reaction force being produced with short poles. Thus, thrust phase duration was a primary factor in determining propulsive anterior-posterior impulse. For the practitioner, the results can be useful in the selection of pole length when the aim is to increase thrust phase duration, anterior-posterior force impulse and velocity.     

Teachers’ objects of responsibility: something to care about in education for sustainable development?

Answers to questions about good teaching in environmental education can be expressed in different selective traditions. Questions as to what should be included in good teaching tend to be addressed by both teachers and researchers on an ideological basis. This qualitative study uses a pragmatist approach, and aims to make an empirical contribution to the debate. Rather than telling teachers what they should teach, this interview study involved listening to ten upper secondary school teachers in Sweden, and their arguments concerning their long‐term teaching purposes. Why should students learn particular things? The teachers’ answers revealed habits and frequently used the same arguments. These arguments recurrently dealt with what teachers particularly cared about, and five objects of responsibility were identified in the interviews. These objects of responsibility constitute the starting points of teachers’ actions and can be seen as personal anchor points within a selective tradition. These points of departure remind the teachers of their teaching aims and objectives, and at the same time, keep them within a tradition. While they help the teachers in their everyday practice, they could just as easily be seen as tacit obstacles to efforts to change environmental education into Education for Sustainable Development. The results are also relevant for science education in general. Issues identified in the study include how the same scientific knowledge could be used for different purposes in education, and the different personal anchor points for long‐term purposes of teaching based on teachers’ own ideas of good teaching. These results can be important in developing a reflection tool for teachers, which in turn can help them to reflect more deeply about how they might change their teaching practices.