Multimedia learning theory, and the research that has supported it, is largely focused on the cognitive elements of learning. Although motivation has been mentioned as a factor in learning in a multimedia environment, motivation has not been measured as a distinctive variable in most studies. Specific attributes of multimedia, including seductive details and segmentation, have been hypothesized to increase interest; however, only studies examining these attributes— effects on learning (measured by recall and transfer) have been conducted. The present study aimed to extend the examination of the use of seductive details and segmentation in multimedia learning by measuring interest in addition to recall and transfer. The participants were 167 undergraduate students who were randomly assigned to four treatment groups involving a tutorial on the formation of lightning, which differed according to the multimedia attributes featured in the tutorial. Treatment groups included seductive details and segmentation (SD+S), seductive details and no segmentation (SD+NS), no seductive details and segmentation (NSD+S), and no seductive details and no segmentation (NSD+NS). Participants took an interest questionnaire before engaging with the tutorial and immediately following the tutorial. Tests of recall and transfer were used to measure learning after the tutorial. Two trained raters evaluated responses. Data from the study were analyzed using Analysis of Variance (ANOVA) and correlation procedures. The results of the study revealed no significant differences among treatment groups in regards to interest, recall, or transfer. There was no significant relationship between interest and recall or interest and transfer. Although the results did not provide support for existing literature on seductive details and segmentation effects or reveal that these attributes increase interest, the implications of the findings present several valuable areas for future research. / Ph. D.

<p> The theoretical treatment of the induced torque problem is discussed, and equations describing the functional form of the torque amplitude are derived on the basis of a model calculation valid in the high field limit. This functional form is applied to a detailed interpretation of the open orbit structure in gallium, cadmium, zinc and copper. </p> <p> An investigation of the open orbit structure in gallium at l.4°K using this technique has yielded direct information on the connectivity of the sixth-band hole surface. This surface supports a k(c)-trajectory for all field directions in the ab plane, except within 0.1° of the a-axis. A k(a)-trajectory of lower conductivity is reported over a 10° range of field direction centred (32°±2°) from the b-axis in the be plane. These data, in addition to the highly anisotropic amplitude and field dependence of the k(c) -trajectory, require that this surface contact the Brillouin zone boundary at both the k(a) -and k(c) -faces. The present data are compared with available models of the sixth band hole surface, and are found to be in excellent agreement with the predictions of recent pseudopotential calculations . The possibility of magnetic breakdown in the k(c)-trajectory for B|| b-axis is discussed. Finally, a non-linear frequency dependence, and an anisotropic non-quadratic field dependence are understood to occur through the long mean free path and short skin depth parameters in gallium at l.4°K. </p> <p> In cadmium, the induced torque amplitude due to the [0001]-open trajectory tends to saturation at high field intensities for all observation directions. This effect is attributed to magnetic breakdown between the first-and secondhand hole surfaces through the spin·-orbit interaction energy 'gap near the H-symmetry point in the AHL plane. This magnetic breakdown effect is analyzed on the basis of a linear chain model and the theoretical curves of Falicov and Sievert. Detailed analysis indicates the possibility of two separate breakdown probabilities across the HL and HA gaps; for <1010> directions , breakdown fields of 10.8 k0e and (as low as) 0.72 k0e are indicated . A similar range of breakdown fields is indicated for all field directions in the (0001) plane. </p> <p> In zinc, the induced torque technique is used to investigate magnetic breakdown effects in the [0001]-trajectory for specific field directions in the basa l plane. These effects are attributed to the onset of partial breakdown between the monster and cap surfaces near the H-symrnetry points, for field intensities above 16 kOe. The linear chain model is shown to be an inappropriate description of breakdown effects in zinc. An onset field of 16 kOe for <1120> is determined; no breakdown is observed along <lOIO> below 20 kOe. In addition, magnetic breakdown effects occurring in the basal orbits of zinc were investigated. The general monotonic rise in torque amplitude with field intensities is fitted to the theoretical expressions of Falicov, Pippard, and Sievert. The giant quantum oscillations arising through coherence-effect modulation of the breakdown probability are shown consistent with earlier data. </p> <p> The technique is applied to a general survey of the various types of open orbits existing in copper, and the general applicability of the sample torque equations to both compensated and uncompensated metals is demonstrated. </p> / Thesis / Doctor of Philosophy (PhD)