Experiments in Group Decision Making Communication Process and Outcome in Face-to-Face Versus Computerized ConferencesA 2 × 2 factorial design was used to explore the process and outcome of small group problem-solving discussions for two modes of communication (face-to-face and computerized conferencing) and two types of tasks (a qualitative human relations task and a scientific ranking test with a criterion solution). Interaction process was coded using Bales Interaction Process Analysis. There were two to three times as many communication units in the face to-face groups consisting of five members each as in the computerized conferencing mode of communication during the same elapsed time. Group decisions were equally good in the two modes, but the groups were less likely to reach agreement in the computerized conferencing mode. There were proportionately more of the types of task-oriented communication associated with decision quality in the computerized conferences.
User Satisfaction with Computer-Mediated Communication SystemsInteractive computer systems should be viewed as “socio-technical” systems whose acceptance is influenced by an interaction among characteristics of the individual users, the groups and organizations in which they are implemented, and the computer systems themselves. Four months after completing baseline questionnaires, new users of four computer-mediated communication systems (CMCS) answered follow-up questionnaires which included a number of items measuring subjective satisfaction. Factor analysis identified two primarily instrumental dimensions (satisfaction with the Interface and with system Performance), and two primarily social-emotional dimensions (Unexpressive—perceived inadequacy of the system for expressive, emotional, or personal communication—and Mode Problems with computer-mediated communication). The strongest correlates of Interface satisfaction are differences in system software and documentation, interacting with baseline attitudes and characteristics of the individual users. By contrast, the strongest correlates of the Unexpressive factor include such group-level variables as frequency of previous (off-line) communication with the group, and attitudes towards the group task. Thus to insure a successful implementation, managers must consider the “fit” between a CMCS and a particular work group.
Alternative processing of mRNAs encoding mammalian chromosomal high-mobility-group proteins HMG-I and HMG-Y.The high-mobility-group protein HMG-I is a well-characterized nonhistone chromosomal protein that is preferentially expressed in rapidly dividing cells, binds to A. T-rich regions of DNA in vitro, and has been localized to particular regions of mammalian metaphase chromosomes. We isolated eight cDNA clones encoding HMG-I and its isoform HMG-Y from a human Raji cell cDNA library and detected blocks of nucleotide sequence rearrangements in the 5'-untranslated regions of these clones. In addition to this leader sequence variation, five of the eight cDNA clones had either a 33- or 36-base-pair in-frame deletion in their open reading frame (ORF); we found that this shortened ORF encodes the HMG-Y protein isoform. We present evidence that the 5'-untranslated-region and ORF heterogeneity of the cDNA clones is the result of alternative processing of RNA transcripts from a single functional gene. Several additional but probably nonfunctional HMG-I or HMG-Y gene copies exist in the human genome; we isolated and partially sequenced one of these pseudogenes and found that it is a processed HMG-Y retropseudogene.
Experiments in group decision making, 3: disinhibition, deindividuation, and group process in pen name and real name computer conferencesComplete murine cDNA sequence, genomic structure, and tissue expression of the high mobility group protein HMG-I(Y).Kenneth Johnson, Donald A. Lehn, Terry S. Elton et al.|Journal of Biological Chemistry|1988 A cDNA coding for the non-histone chromosomal protein HMG-I, or its isoform HMG-Y, was isolated from a murine Friend cell library using synthetic oligonucleotide hybridization probes. Sequence analysis showed that the 1670-base pair full length cDNA insert consists of a 201-base pair, G/C-rich (74%), 5'-untranslated region, a 288-base pair amino acid coding sequence, and an unusually long 1182-base pair 3'-untranslated region. The deduced 96-residue amino acid coding sequence of the murine HMG-I(Y) cDNA is very similar to the reported amino acid sequence of human HMG-I, except that it lacks 11 internal amino acids reported in the human protein. Based on Southern blot hybridization analysis of genomic DNA, there appear to be fewer than five copies of HMG-I(Y) genes in the haploid murine genome. These murine HMG-I(Y) genes contain a large (at least 890 base pairs) exon that includes most, or all, of the 3'-untranslated region; whereas the much shorter 5'-untranslated region and amino acid coding sequences are interrupted by at least one intron. A single size class (approximately 1700 nucleotides in murine cells and 2000 nucleotides in human cells) of HMG-I(Y) mRNAs was detected at high levels in total RNA extracts from rapidly dividing, transformed cells, but to a lesser extent, or not at all, in extracts from slowly or non-dividing cells.