This is one show you do not want to miss! He was one of the literary pioneers of the Steampunk movement, along with Tim Powers and K. Dick Memorial Award in Henry Award in Despite his close association with Steampunk, most of his work is contemporary, realistic fantasy set in southern California, typified by books like The Last Coin , The Rainy Season , and Knights of the Cornerstone , which have lead to his being referred to as both a California regional writer and a writer of magical realism.
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Jim began teaching composition in , and during the fifteen years that followed he taught both composition and creative writing at several Orange County, California, colleges and universities. For the past twenty years he has been a professor at Chapman University.
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In , he developed the Creative Writing Conservatory at the Orange County School of the Arts and has directed the conservatory since. In he received the U. Just a few excerpts from a very fun interview! For ore, be sure to listen to the show right here or download it from iTunes to take with you. Ives, brilliant and eccentric scientist and explorer, is at home in Aylesford with his family. A few miles to the north a steam launch has been taken by pirates above Egypt Bay, the crew murdered and pitched overboard.
If found to occur in the real world, MIB may hold implications for driving safety, where the most common point of gaze is at the centre of the expanding optic flow of the approaching road 54 , 55 , Additionally, items that need to be monitored, such as brake lights of cars ahead, overtaking cars or GPS devices attached to the windscreen, reside mainly in upper peripheral quadrants, which we found prone to perceptual disappearance. While drivers may often saccade to check mirrors, scan for other cars and so forth, there are also situations in which fixations lengthen and saccade frequency decreases.
These situations include driving on rural as opposed to urban roads 46 , 57 , during times of danger or hazard 46 , when multi-tasking 58 , 59 and when experiencing fatigue Given that fewer saccades and longer fixations result in greater target disappearance, MIB may be more likely to occur during hazardous situations or driver fatigue - two of the most influential factors relating to traffic accidents Future research should attempt to measure the occurrence of MIB directly in conditions that approximate the statistics of the real world experience in a closer fashion, especially given its potential impact on driving safety.
Examples of this may be tasks that measure brightness increments and reaction time in MIB, or apply the probe technique used in binocular rivalry to measure MIB indirectly, where the detection of a probe is expected to be impaired during target disappearance. Tasks such as these will hold stronger implications for driving safety, where MIB may play a role in the failure to detect crucial objects or changes in appearance, such as the brake lights of a car travelling in front. Such research could utilise a virtual reality environment to directly test the hypothesis of MIB occurring under driving circumstances, which would allow for stronger conclusions of the real-world implications than can be drawn from our stimuli.
Using this technology crucial information is projected onto the windscreen or visor in the form of stable symbols and text, through which the moving background of road or land is viewed. Such technology can be found, for example, in the use of F Fighter Jet helmets which have been developed to project flight information onto the visor viewed by the pilot over the moving background 62 , or increasingly in commercially available cars with dashboard information projected onto the windscreen Ethics approval was obtained from the Monash University Human Research Ethics Committee, and informed consent was obtained from all participants in the form of written permission prior to participation.
Experiments were carried out in accordance with with the relevant guidelines and regulations.
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Thirty-seven participants were recruited at Monash University, all meeting the requirement of normal or corrected-to-normal vision. Experiments were run in an experimental room without natural light, with artificial lights dimmed in Experiments 1 and 3, and adjusted to a level enabling the proper performance of the Tobii TX eye tracker in Experiments 2 and 4. Hereafter, the stimulus specifications presented are for Experiments 1 and 3 with those for Experiments 2 and 4 in brackets.
The mask was constructed as a 2-D rendering of a 3-D circular tunnel with randomly placed dots, through which the participant experienced simulated forward or backward motion. The tunnel was generated anew for each 1-minute trial, had a 5 meter radius, and was meters long. The mask consisted of white dots, placed randomly on the perimeter of the tunnel.
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Dots moved progressively out of a central cluster about 0. Unlike real-life dot progression however, the dots did not change in size with expansion or contraction 53 , because we aimed to focus primarily on the influence of motion information. The peripheral target for MIB was a white disc with a 0.
The disc was located Within each second trial, one catch episode occurred in which the target physically disappeared from the display for a short period of time. The luminance of the target was linearly ramped off over 1. Participants were not told of the catch, but only encouraged to report all perceived disappearances. Accordingly, if the participants did not report physical disappearance of the catch appropriately, we regarded that they had not paid attention to the task in that trial.
Debriefing with a number of participants revealed that they were surprised to hear of the catch disappearances, as they had not been able to tell the catch from the genuine perceptual disappearances. While three participants failed to record the catch on one or more trials, analyses with these participants excluded produced no significant difference to results.
Their data was therefore included for analysis. In Experiments 2 and 4, we also recorded participant fixation locations using an eye tracker. One purpose of eye tracking was to exclude participants who looked directly at the peripheral target, failing to fixate on the central point at any time.
If the fixation duration on the peripheral target per second trial was longer than one second, the participant was considered for exclusion. Only three participants met this exclusion criterion on at least one trial.
As including or excluding them did not significantly alter the results, we included their data for analysis. The other purpose of eye tracking was to quantify the influence of eye movements on MIB 31 , 45 , which might to some degree explain the effects of our experimental manipulation of motion stimuli.
In Experiments 1 and 2, three different types of mask were presented—expansion simulated forward motion ; contraction simulated backwards motion , and a static still frame in which there was no dot movement. The four different target locations were balanced and randomised over trials. Eye-movements were recorded during Experiment 2. In Experiment 3, only forward motion was simulated, resulting in an expanding motion pattern. In Experiment 4, instead of a central cluster, the fixation point was explicitly presented as a white cross with a size of 0. The cross was surrounded by an exclusion radius of 2.
In addition, only in Experiment 4, all dots in total moved at a constant speed of 3. Four different types of mask were presented: 2-D radial expansion, 2-D radial contraction, 2-D static and 2-D random movement. Removed dots, and dots which crossed the outer edge of the display were replaced at a random position on the screen. Due to the stimulus layout, this experiment had a uniform density of mask dots on the screen, while the other experiments had a decreasing density with increasing eccentricity.
Participants sat comfortably in front of the computer, with their head stabilised by a chin rest. They were instructed to fixate on the central area of the screen and to indicate the perceptual invisibility of the target by holding down the spacebar for as long as the target remained invisible. Participants were instructed to pay attention to the peripheral target, without looking at it directly.
Experiments 2 and 4 followed the same procedure as 1 and 3, however eye movements were also recorded.
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Participants underwent a standard 9-point eye-tracking calibration before the experiment started, and did not move their heads away from the chin rest for the duration of the experiment. We excluded the catch events from our analysis for the calculation of percentage disappearance, rate, and durations of disappearance episodes. For percentage disappearance we excluded the part of reported disappearances that overlapped with the catch, and total trial duration was adjusted to exclude the catch event.
For rate, we excluded disappearances that started during the catch event. For the durations of disappearance episodes we excluded disappearances that overlapped the catch by any amount, and we also excluded disappearances that overlapped with the end of the trial. The mean percentage, rate or duration of disappearance per condition were the three dependent variables DV. For comparison, all analyses were also run using the median instead of the mean. To examine how much of the observed MIB disappearance in each trial could be explained by the frequency of saccades, which are expected to reduce MIB, and the location of the target, we used the linear mixed effect model LME in Matlab ver a.
Subject variability was taken into account as a random effect. NumberOfSaccades was only entered when available Experiment 2 and 4 , in which case we included it in the unrestricted model as an interaction with MaskType. Assumptions for all tests were met, with the exception of violated normality in several conditions across experiments. A constant of 1 was added to all data when performing the transformation, due to the dataset containing 0 values Alternate transformations Log10, Reciprocal also failed to correct normality in this variable. The violation in the static mask control condition was due to the majority of participants recording disappearance scores of zero for this condition, as expected.
Given that negative values were not possible in our study, this necessarily led to a skewed distribution in the static condition. As the violated static condition was serving as a control for comparison only within our ANOVA analyses, the square root transformation was retained and parametric tests run despite the violation. Saccades and fixations were detected offline using a velocity-based algorithm Saccades with an amplitude larger or smaller than 1 degree of visual angle were categorised as macro-saccades or micro-saccades, respectively.
Pupil diameter was also recorded by the Tobii TX Eyetracker. We analysed the left eye and followed procedures by Kloosterman et al. The pupil diameter over the first ms of each excerpt was subtracted from the signal, and the result was then divided by the mean pupil diameter over the entire experiment dividing by the mean per condition yielded identical results in terms of passing statistical significance.
This was done per participant separately. To estimate the sustained, baseline tonic level of pupillary diameter for each motion stimulus, we calculated the mean pupil diameter for each of the movement conditions separately, without normalisation. Publisher's note: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.
Bonneh, Y. Motion-induced blindness in normal observers.
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Nature , — Kim, C. Psychophysical magic: rendering the visible invisible. Trends in Cognitive Sciences 9 , — Dieter, K. Motion-induced blindness continues outside visual awareness and without attention. Scientific Reports 5 , 1—8 Kloosterman, N. Top-down modulation in human visual cortex predicts the stability of a perceptual illusion.
sdirsewebpiverd.ml Journal of Neurophysiology , —76 Libedinsky, C.