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Correlation between Inter-Blink Interval and Episodic Encoding during Movie Watching.

Shin YS, Chang WD, Park J, Im CH, Lee SI, Kim IY, Jang DP - PLoS ONE (2015)

Bottom Line: In addition, the significant increase in IEBI when watching a movie coincided with the most memorable scenes of the movie.The results suggested that the interesting episodic narrative of the movie attracted the subjects' visual attention relative to the documentary clip that did not have a story line.In the episodic memory test executed four weeks later, memory performance was significantly positively correlated with IEBI (p<0.001).

View Article: PubMed Central - PubMed

Affiliation: Department of Biomedical Engineering, Hanyang University, Seoul, Korea.

ABSTRACT
Human eye blinking is cognitively suppressed to minimize loss of visual information for important real-world events. Despite the relationship between eye blinking and cognitive state, the effect of eye blinks on cognition in real-world environments has received limited research attention. In this study, we focused on the temporal pattern of inter-eye blink interval (IEBI) during movie watching and investigated its relationship with episodic memory. As a control condition, 24 healthy subjects watched a nature documentary that lacked a specific story line while electroencephalography was performed. Immediately after viewing the movie, the subjects were asked to report its most memorable scene. Four weeks later, subjects were asked to score 32 randomly selected scenes from the movie, based on how much they were able to remember and describe. The results showed that the average IEBI was significantly longer during the movie than in the control condition. In addition, the significant increase in IEBI when watching a movie coincided with the most memorable scenes of the movie. The results suggested that the interesting episodic narrative of the movie attracted the subjects' visual attention relative to the documentary clip that did not have a story line. In the episodic memory test executed four weeks later, memory performance was significantly positively correlated with IEBI (p<0.001). In summary, IEBI may be a reliable bio-marker of the degree of concentration on naturalistic content that requires visual attention, such as a movie.

No MeSH data available.


Related in: MedlinePlus

Statistical comparisons and cumulative distribution in three conditions.(A) The graph shows the average of IEBIs and histogram of IEBIs for each of the three conditions (Fig 2 and S1 Dataset). The portion of the histogram between 8 and 67 s has been magnified to more clearly illustrate the distribution of long IEBIs. (B) Cumulative distribution functions for each of the three conditions. The red, sky-blue and black lines show MOVIE, CONTROL and REST conditions, respectively. (p < 0.01** Denotes a statistically significant difference.)
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pone.0141242.g002: Statistical comparisons and cumulative distribution in three conditions.(A) The graph shows the average of IEBIs and histogram of IEBIs for each of the three conditions (Fig 2 and S1 Dataset). The portion of the histogram between 8 and 67 s has been magnified to more clearly illustrate the distribution of long IEBIs. (B) Cumulative distribution functions for each of the three conditions. The red, sky-blue and black lines show MOVIE, CONTROL and REST conditions, respectively. (p < 0.01** Denotes a statistically significant difference.)

Mentions: The mean IEBIs in REST and CONTROL conditions were 2.6 ± 0.8(SD) s and 3.2 ± 1.6 (SD) s respectively, increasing to 4.0 ± 2.6 (SD) s during the movie watching. The changes of IEBIs across conditions were more clearly visible in the distribution of IEBIs, as shown in Fig 2A. IEBI were more widely distributed within the MOVIE condition compared with the CONTROL and REST conditions. As mentioned above, Kolmogorov-Smirnov tests were employed to compare the statistical difference across conditions. Statistically significant differences were revealed between MOVIE and CONTROL (p < 0.01, k = 0.0408), MOVIE and REST (p < 0.01, k = 0.0708) and CONTROL and REST (p < 0.01, k = 0.0434). And the medians in MOVIE, CONTROL and REST were 2. Interquartile ranges of these conditions also were 2.


Correlation between Inter-Blink Interval and Episodic Encoding during Movie Watching.

Shin YS, Chang WD, Park J, Im CH, Lee SI, Kim IY, Jang DP - PLoS ONE (2015)

Statistical comparisons and cumulative distribution in three conditions.(A) The graph shows the average of IEBIs and histogram of IEBIs for each of the three conditions (Fig 2 and S1 Dataset). The portion of the histogram between 8 and 67 s has been magnified to more clearly illustrate the distribution of long IEBIs. (B) Cumulative distribution functions for each of the three conditions. The red, sky-blue and black lines show MOVIE, CONTROL and REST conditions, respectively. (p < 0.01** Denotes a statistically significant difference.)
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4631519&req=5

pone.0141242.g002: Statistical comparisons and cumulative distribution in three conditions.(A) The graph shows the average of IEBIs and histogram of IEBIs for each of the three conditions (Fig 2 and S1 Dataset). The portion of the histogram between 8 and 67 s has been magnified to more clearly illustrate the distribution of long IEBIs. (B) Cumulative distribution functions for each of the three conditions. The red, sky-blue and black lines show MOVIE, CONTROL and REST conditions, respectively. (p < 0.01** Denotes a statistically significant difference.)
Mentions: The mean IEBIs in REST and CONTROL conditions were 2.6 ± 0.8(SD) s and 3.2 ± 1.6 (SD) s respectively, increasing to 4.0 ± 2.6 (SD) s during the movie watching. The changes of IEBIs across conditions were more clearly visible in the distribution of IEBIs, as shown in Fig 2A. IEBI were more widely distributed within the MOVIE condition compared with the CONTROL and REST conditions. As mentioned above, Kolmogorov-Smirnov tests were employed to compare the statistical difference across conditions. Statistically significant differences were revealed between MOVIE and CONTROL (p < 0.01, k = 0.0408), MOVIE and REST (p < 0.01, k = 0.0708) and CONTROL and REST (p < 0.01, k = 0.0434). And the medians in MOVIE, CONTROL and REST were 2. Interquartile ranges of these conditions also were 2.

Bottom Line: In addition, the significant increase in IEBI when watching a movie coincided with the most memorable scenes of the movie.The results suggested that the interesting episodic narrative of the movie attracted the subjects' visual attention relative to the documentary clip that did not have a story line.In the episodic memory test executed four weeks later, memory performance was significantly positively correlated with IEBI (p<0.001).

View Article: PubMed Central - PubMed

Affiliation: Department of Biomedical Engineering, Hanyang University, Seoul, Korea.

ABSTRACT
Human eye blinking is cognitively suppressed to minimize loss of visual information for important real-world events. Despite the relationship between eye blinking and cognitive state, the effect of eye blinks on cognition in real-world environments has received limited research attention. In this study, we focused on the temporal pattern of inter-eye blink interval (IEBI) during movie watching and investigated its relationship with episodic memory. As a control condition, 24 healthy subjects watched a nature documentary that lacked a specific story line while electroencephalography was performed. Immediately after viewing the movie, the subjects were asked to report its most memorable scene. Four weeks later, subjects were asked to score 32 randomly selected scenes from the movie, based on how much they were able to remember and describe. The results showed that the average IEBI was significantly longer during the movie than in the control condition. In addition, the significant increase in IEBI when watching a movie coincided with the most memorable scenes of the movie. The results suggested that the interesting episodic narrative of the movie attracted the subjects' visual attention relative to the documentary clip that did not have a story line. In the episodic memory test executed four weeks later, memory performance was significantly positively correlated with IEBI (p<0.001). In summary, IEBI may be a reliable bio-marker of the degree of concentration on naturalistic content that requires visual attention, such as a movie.

No MeSH data available.


Related in: MedlinePlus