An eye tracking study of the application of gestalt theory in photography.

Photography is an art form where integration of the human visual perception and psychological experiences result in aesthetic pleasure. This research utilizes eye tracking to explore the impact of the properties of Gestalt in photography on people's visual cognitive process in order to understand the psychological processes and patterns of photography appreciation. This study found that images with Gestalt qualities can significantly affect fixation, sightline distribution, and subjective evaluation of aesthetics and complexity. Closure composition images seem to make cognition simpler, resulting in the least number of fixation and saccades, longer fixation duration, and more concentrated sightline indicating stronger feeling of beauty, while images which portray similarity results in the greatest fixation and saccades, longest saccade duration, and greater scattering of sightline, indicating feelings of complexity and unsightliness. The results of this research are closely related to the theories of art and design, and have reference value for photography theory and application.

Lack of Complete Pretreatment Staging Is Associated With Omission of Neoadjuvant Therapy for Rectal Cancer: A Statewide Study.

BACKGROUND: Standardized local staging and neoadjuvant therapy are rectal cancer management quality measures supported by the Commission on Cancer and National Accreditation Program for Rectal Cancer for the management of rectal cancer. Previous studies suggested that up to 25% of patients with stage II/III rectal cancer patients do not receive neoadjuvant therapy. We hypothesized that failure to receive neoadjuvant therapy may be caused by failure to properly stage patients before surgery. OBJECTIVE: This study aimed to determine whether lack of local rectal cancer staging is associated with underutilization of neoadjuvant therapy and to determine risk factors for omission of neoadjuvant therapy. DESIGN: Retrospective cohort study. Bivariate and multivariable analyses were performed on patient, tumor, and 30-day outcome factors associated with neoadjuvant therapy and staging. SETTINGS: hospitals participated in the Michigan Surgical Quality Collaborative Colorectal Cancer Project from January 2014 to December 2019. PATIENTS: Elective, clinical stage II/III, mid-to-low rectal cancer resections. Patients with upper rectal cancer were excluded. MAIN OUTCOME MEASURES: Percentage of patients receiving neoadjuvant therapy. RESULTS: The final cohort included 350 patients with clinical stage II/III mid or low rectal cancer-80.9% of patients who had received neoadjuvant therapy and 83.2% of patients who had MRI and/or endoscopic ultrasound. A significant association was found between receiving neoadjuvant therapy and MRI/endorectal ultrasound staging ( p < 0.0001). Eighty-seven percent of patients who had MRI/endorectal ultrasound received neoadjuvant chemoradiotherapy; 49% of patients who did not have MRI/endorectal ultrasound staging received neoadjuvant chemoradiotherapy. Multivariate analysis revealed that risk factors for the omission of neoadjuvant therapy were older age and incomplete staging. LIMITATIONS: Observational study with the possibility of unmeasured confounding variables. CONCLUSIONS: Neoadjuvant therapy is underused in patients with stage II/III rectal cancer. Omission of pretreatment staging with MRI/endorectal ultrasound is associated with omission of neoadjuvant therapy. These data suggest the need for regional and national quality improvement strategies to standardize the multidisciplinary management of rectal cancer. See Video Abstract at http://links.lww.com/DCR/B923 . LA FALTA DE ESTADIFICACIN COMPLETA PREVIA AL TRATAMIENTO SE ASOCIA CON LA OMISIN DE LA TERAPIA NEOADYUVANTE PARA EL CNCER DE RECTO UN ESTUDIO ESTATAL: ANTECEDENTES: La estadificación local estandarizada y la terapia neoadyuvante son medidas de calidad de la Comisión sobre el Cáncer y el Programa Nacional de Acreditación para el Cáncer de Recto para el tratamiento del cáncer de recto. Estudios previos sugirieron que hasta el 25% de los pacientes con cáncer de recto en estadio II/III no reciben terapia neoadyuvante. Planteamos la hipótesis de que la falla en recibir la terapia neoadyuvante puede deberse a la falla en la estadificación adecuada de los pacientes antes de la cirugía.OBJETIVO: El propósito de este estudio es determinar si la falta de estadificación local del cáncer de recto está asociada con la infrautilización de la terapia neoadyuvante y determinar los factores de riesgo para la omisión de la terapia neoadyuvante.DISEÑO: Estudio de cohorte retrospectivo. Se realizaron análisis bivariados y multivariados sobre el paciente, el tumor y los factores de resultado a los 30 días asociados con la terapia neoadyuvante y la estadificación.AJUSTE: Un total de 31 hospitales que participaron en el Proyecto Quirugico Colaborativo de Cáncer Colorrectal de Calidad de Michigan desde enero de 2014 hasta diciembre de 2019.PACIENTES: Resecciones electivas, en estadio clínico II/III, de cáncer de recto medio a bajo. Se excluyeron los pacientes con cáncer de recto superior.MEDIDA DE RESULTADO PRINCIPAL: Porcentaje de pacientes que reciben terapia neoadyuvante. Porcentaje de pacientes que reciben terapia neoadyuvante.RESULTADOS: La cohorte final fue de 350 casos con cáncer de recto medio o bajo en estadio clínico II/III. El 80,9% tenía terapia neoadyuvante y el 83,2%, resonancia magnética y/o ultrasonido endoscópico. Hubo una asociación significativa entre recibir terapia neoadyuvante y la estadificación MRI/ERUS ( p < 0,0001). El 87% de los pacientes a los que se les realizaron imágenes con MRI/ERUS recibieron NT, mientras que el 49% de los pacientes a los que no se les realizó la estadificación con MRI/ERUS tuvieron NT. El análisis multivariante reveló que los factores de riesgo para la omisión de la terapia neoadyuvante fueron la edad avanzada y la estadificación incompleta.LIMITACIONES: Estudio observacional con posibilidad de confusión de variables no medidas.CONCLUSIONES: La terapia neoadyuvante está infrautilizada en pacientes con cáncer de recto en estadio II/III. La omisión de la estadificación previa al tratamiento con MRI/ERUS se asocia con la omisión de la terapia neoadyuvante. Estos datos sugieren la necesidad de estrategias regionales y nacionales de mejora de la calidad para estandarizar el manejo multidisciplinario del cáncer de recto. Consulte Video Resumen en http://links.lww.com/DCR/B923 . (Traducción-Dr Yolanda Colorado ).

Recurrence of Acute Right Colon Diverticulitis Following Nonoperative Management: A Systematic Review and Meta-analysis.

BACKGROUND: There are currently no guidelines on the management of right colon diverticulitis. Treatment options have been extrapolated from the management of left-sided diverticulitis. Gaining knowledge of the risk and morbidity of diverticulitis recurrence is integral to weighing the benefit of elective surgery for right-sided diverticulitis. OBJECTIVE: The purpose of this study was to summarize the recurrence rate and the morbidity of recurrence of Hinchey classification I/II, right-sided diverticulitis following nonoperative management. DATA SOURCES: PubMed, EMBASE, and Cochrane Database of Collected Reviews were searched up to June 2019. STUDY SELECTION: Observational cohort studies evaluating outcomes following nonoperative management were reviewed. No randomized controlled trials were available. INTERVENTIONS: Intravenous antibiotics with or without percutaneous drainage of associated abscess were administered. MAIN OUTCOME MEASURES: The primary outcomes measured were the recurrence rate and morbidity associated with recurrence. Two independent investigators extracted data. The rates of recurrence were pooled by using a random-effects model. RESULTS: There were 1584 adult participants from a total of 11 studies (9 retrospective cohort and 2 prospective cohort studies) included in the analysis. Over a median follow-up period of 34.2 months, the pooled recurrence rate was 12% (95% CI, 10%-15%). Twenty of 202 patients (9.9%) required urgent surgery at the time of first recurrence. There was no mortality. Subset analysis excluding 3 studies that included percutaneous drainage as a nonoperative treatment option did not change the recurrence rate (12% (95% CI, 9%-15%)) or heterogeneity. Funnel plot assessment revealed no publication bias. LIMITATIONS: There were no randomized controlled trials available. The statistical heterogeneity was moderate (I = 46%). CONCLUSIONS: Nonoperative management of Hinchey I/II right-sided diverticulitis is safe and feasible. The recurrence rate is relatively low, and complications that require urgent operation are uncommon. PROSPERO: CRD42019131673.

Salient collinear grouping diminishes local salience in visual search: an eye movement study.

Our eyes and attention are easily attracted to salient items in search displays. When a target is spatially overlapped with a salient distractor (overlapping target), it is usually detected more easily than when it is not (nonoverlapping target). Jingling and Tseng (2013), however, found that a salient distractor impaired visual search when the distractor was comprised of more than nine bars collinearly aligned to each other. In this study, we examined whether this search impairment is due to reduction of salience on overlapping targets. We used the short-latency saccades as an index for perceptual salience. Results showed that a long collinear distractor decreases perceptual salience of local overlapping targets in comparison to nonoverlapping targets, reflected by a smaller proportion of the short-latency saccades. Meanwhile, a salient noncollinear distractor increases salience of overlapping targets. Our results led us to conclude that a long collinear distractor diminishes the perceptual salience of the target, a factor which poses a counter-intuitive condition in which a target on a salient region becomes less salient. We discuss the possible causes for our findings, including crowding, the global precedence effect, and the filling-in of a collinear contour.

Unconscious processing embedded in conscious processing: evidence from gaze time on Chinese sentence reading.

The current study aims to separate conscious and unconscious behaviors by employing both online and offline measures while the participants were consciously performing a task. Using an eye-movement tracking paradigm, we observed participants' response patterns for distinguishing within-word-boundary and across-word-boundary reverse errors while reading Chinese sentences (also known as the "word inferiority effect"). The results showed that when the participants consciously detected errors, their gaze time for target words associated with across-word-boundary reverse errors was significantly longer than that for targets words associated with within-word-boundary reverse errors. Surprisingly, the same gaze time pattern was found even when the readers were not consciously aware of the reverse errors. The results were statistically robust, providing converging evidence for the feasibility of our experimental paradigm in decoupling offline behaviors and the online, automatic, and unconscious aspects of cognitive processing in reading.