Computer systems cannot improve organizational performance if they aren't used. Unfortunately, resistance to end-user systems by managers and professionals is a widespread problem. To better predict, explain, and increase user acceptance, we need to better understand why people accept or reject computers. This research addresses the ability to predict peoples' computer acceptance from a measure of their intentions, and the ability to explain their intentions in terms of their attitudes, subjective norms, perceived usefulness, perceived ease of use, and related variables. In a longitudinal study of 107 users, intentions to use a specific system, measured after a one-hour introduction to the system, were correlated 0.35 with system use 14 weeks later. The intention-usage correlation was 0.63 at the end of this time period. Perceived usefulness strongly influenced peoples' intentions, explaining more than half of the variance in intentions at the end of 14 weeks. Perceived ease of use had a small but significant effect on intentions as well, although this effect subsided over time. Attitudes only partially mediated the effects of these beliefs on intentions. Subjective norms had no effect on intentions. These results suggest the possibility of simple but powerful models of the determinants of user acceptance, with practical value for evaluating systems and guiding managerial interventions aimed at reducing the problem of underutilized computer technology.

User Acceptance of Computer Technology: A Comparison of Two Theoretical Models

抗原变异可使得多种致病微生物易于逃避宿主免疫应答。表达在感染红细胞表面的恶性疟原虫红细胞表面蛋白1（PfPMP1）与感染红细胞、内皮细胞、树突状细胞以及胎盘的单个或多个受体作用，在黏附及免疫逃避中起关键的作用。每个单倍体基因组var基因家族编码约60种成员，通过启动转录不同的var基因变异体为抗原变异提供了分子基础。

疟原虫var基因转换速率变化导致抗原变异[英]／Paul H, Robert P, Christodoulou Z, et al//Proc Natl Acad Sci U S A

A hypothesized need to form and maintain strong, stable interpersonal relationships is evaluated in light of the empirical literature. The need is for frequent, nonaversive interactions within an ongoing relational bond. Consistent with the belongingness hypothesis, people form social attachments readily under most conditions and resist the dissolution of existing bonds. Belongingness appears to have multiple and strong effects on emotional patterns and on cognitive processes. Lack of attachments is linked to a variety of ill effects on health, adjustment, and well-being. Other evidence, such as that concerning satiation, substitution, and behavioral consequences, is likewise consistent with the hypothesized motivation. Several seeming counterexamples turned out not to disconfirm the hypothesis. Existing evidence supports the hypothesis that the need to belong is a powerful, fundamental, and extremely pervasive motivation.

The need to belong: Desire for interpersonal attachments as a fundamental human motivation.

The present research develops and tests a theoretical extension of the Technology Acceptance Model (TAM) that explains perceived usefulness and usage intentions in terms of social influence and cognitive instrumental processes. The extended model, referred to as TAM2, was tested using longitudinal data collected regarding four different systems at four organizations ( N = 156), two involving voluntary usage and two involving mandatory usage. Model constructs were measured at three points in time at each organization: preimplementation, one month postimplementation, and three months postimplementation. The extended model was strongly supported for all four organizations at all three points of measurement, accounting for 40%--60% of the variance in usefulness perceptions and 34%--52% of the variance in usage intentions. Both social influence processes (subjective norm, voluntariness, and image) and cognitive instrumental processes (job relevance, output quality, result demonstrability, and perceived ease of use) significantly influenced user acceptance. These findings advance theory and contribute to the foundation for future research aimed at improving our understanding of user adoption behavior.

https://www.jstor.org/stable/pdfplus/2634758.pdf

A Theoretical Extension of the Technology Acceptance Model: Four Longitudinal Field Studies

Co-Planar Stereotaxic Atlas of the Human Brain—3-Dimensional Proportional System: An Approach to Cerebral Imaging, J. Talairach, P. Tournoux. Georg Thieme Verlag, New York (1988), 122 pp., 130 figs. DM 268

People often feel like their minds and their bodies are in different places. Far from an exotic experience, this phenomenon seems to be ubiquitous facet of human life (e.g., Killingsworth & Gilbert, 2010). Many times, people’s minds seem to go “somewhere else”—attention becomes disconnected from perception, and people’s minds wander to times and places removed from the current environment (e.g., Schooler, Reichle & Halpern, 2004). At other times, however, people’s minds may seem to go nowhere at all—they simply disappear. This mental state—mind-blanking—may represent an extreme decoupling of perception and attention, one in which attention fails to bring any stimuli into conscious awareness. In the present research, we outline the properties of mind-blanking, differentiating this mental state from other mental states in terms of phenomenological experience, behavioral outcomes, and underlying cognitive processes. Seven experiments suggest that when the mind seems to disappear, there are times when we have simply failed to monitor its whereabouts—and there are times when it is actually gone.

/pdf/mind-blanking-when-the-mind-goes-away-23pnkhw39x.pdf

Mind-blanking: when the mind goes away

From secrecy to psychopathology.

http://www.mpmlab.org/Gray,%20Knickman%20&%20Wegner%20(2011)%20PVS.pdf

More dead than dead: perceptions of persons in the persistent vegetative state.

A theoretical analysis of the structure of social interaction led us to postulate two distinct processes through which leading questions may mislead people. When a questioner asks a leading question of a respondent, observers may use their knowledge of conversational rules to infer that the questioner had an evidentiary basis for the question. Hence, observers will treat the question as conjectural evidence for the view of the respondent implied by the question. In addition, observers who listen to respondents answer leading questions may be misled by the answers because, in an effort to cooperate with the questioner, respondents may supply behavioral evidence that misrepresents their actual personalities. To test these hypotheses, we conducted two experiments in which observers listened to tape-recorded interviews. Questioners in these interviews asked respondents a series of leading questions that probed for evidence of either introversion or extroversion. The first experiment snowed that it did not matter whether observers had access to the conjectural evidence in the interviewer's questions, the behavioral evidence in respondent's answers, or both. In each case observers inferred that the respondent possessed the characteristics for which the questioner had probed. The second experiment showed that when the evidentiary basis of the conjectures was undermined by informing observers that the leading questions had been drawn from a fishbowl, observers ignored conjectural evidence but still used behavioral evidence. The discussion considered the processes through which conjectures may create their own cognitive and behavioral reality.

Daniel M. Wegner

Papers

Mind-blanking: when the mind goes away

From secrecy to psychopathology.

More dead than dead: perceptions of persons in the persistent vegetative state.

Where Leading Questions Can Lead: The Power of Conjecture in Social Interaction

Psychology (2nd Edition)