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Does a presentation's medium affect its message? PowerPoint, Prezi, and oral presentations.

ABSTRACT: Despite the prevalence of PowerPoint in professional and educational presentations, surprisingly little is known about how effective such presentations are. All else being equal, are PowerPoint presentations better than purely oral presentations or those that use alternative software tools? To address this question we recreated a real-world business scenario in which individuals presented to a corporate board. Participants (playing the role of the presenter) were randomly assigned to create PowerPoint, Prezi, or oral presentations, and then actually delivered the presentation live to other participants (playing the role of corporate executives). Across two experiments and on a variety of dimensions, participants evaluated PowerPoint presentations comparably to oral presentations, but evaluated Prezi presentations more favorably than both PowerPoint and oral presentations. There was some evidence that participants who viewed different types of presentations came to different conclusions about the business scenario, but no evidence that they remembered or comprehended the scenario differently. We conclude that the observed effects of presentation format are not merely the result of novelty, bias, experimenter-, or software-specific characteristics, but instead reveal a communication preference for using the panning-and-zooming animations that characterize Prezi presentations.

SUBMITTER: Moulton ST

PROVIDER: S-EPMC5497950 | biostudies-literature |

REPOSITORIES: biostudies-literature

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Project description:Introduction: As robotic-guidance and minimally invasive approaches become more prevalent in spine surgery, there is a growing interest in high-level scientific evidence of their clinical value. MIS ReFRESH is the first prospective, comparative, multi-center study designed to assess differences in surgical complication and revision rates, and exposure to intra-operative radiation, in adult degenerative conditions, operated in a minimally invasive (MIS) approach in 1-to-3 level fusions. Materials and Methods: Multicenter data (9 sites) were prospectively collected from 379 adult patients indicated for fusion surgery, including demographics, complications, need for revision surgery and use of intra-operative fluoroscopy (in seconds). A single site randomized patients between arms, while other sites enrolled exclusively to one arm. We compared of incidence of revision surgeries and clinical complications (surgical and medical) through a logistic regression model (Cox) as well as intra-operative fluoroscopy use. Results: Altogether, 9 sites enrolled 379 cases: 287 in the robot-guided arm (RG), and 92 in the fluoro-guided arm (FG). One site randomized patients, 15 to RG and 11 to FG. Mean age of RG patients was 59.1 years vs. 62.4 for FG (p = 0.032) and BMI was 31.4 vs. 28.0, respectively (p < 0.001). Sex distribution was similar at 62.0% females in RG and 57.4% in FG (p = 0.468). Charlson Comorbidity Index was 0.5 ± 0.8 in RG vs. 0.3 ± 0.6 in FG (p = 0.022). There were 4.8 ± 1.2 pedicle screws per case in RG vs. 4.3 ± 0.9 screws in FG (p < 0.001). In RG 33% of cases were 2-levels and 5% 3-levels, while in FG 16% were 2-level fusions, and 1% were 3-level fusions. Use of fluoroscopy for the instrumentation phase was 3.8 ± 3.9 seconds/screw in RG vs. 16.9 ± 9.2 in FG (p < 0.001). Average follow up was 174 days in RG and 159 in FG. Within the first year of follow up there were 28 (9.7%) complications in RG vs. 35 (38.0%) in FG, and 4 (1.4%) revisions in RG vs. 4 (4.3%) in FG. When evaluated in a Cox logistic regression model that includes age, gender, BMI, Charlson Comorbidity Index and number of executed screws, the Relative Risk (RR) for a complication was 5.3 times higher in FG compared to RG (95% Confidence Interval (CI): 3.0-9.5, p < 0.001). RR for a revision surgery were 7.1 times higher for a fluoro-guided surgery compared to the robot-guided cases (95% CI 1.6-32.6, p = 0.012). Conclusion: We report our findings from a prospective, multi-center, comparative study of MIS lumbar fusions performed with robotic-guidance in 287 patients vs. fluoro-guidance in 92 controls. RR for a complication or a revision surgery was significantly higher in FG during the first year of follow-up compared to RG (5.3-fold and 7.1-fold, respectively). RG reduced fluoroscopy exposure time per case by 78%, or almost a minute, helping offset the patients’ exposure during the pre-operative CT scan required for planning the robotic procedure.

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Does a presentation's medium affect its message? PowerPoint, Prezi, and oral presentations.

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