Accuracy of Six Interpolation Methods Applied on Pupil Diameter Data

Dan, Emanuela Loredana; Dînşoreanu, Mihaela; Mureșan, Raul C.

doi:10.1109/aqtr49680.2020.9129915

Cited by 23 publications

(18 citation statements)

References 13 publications

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“…For example, we did not assess how the different software used for pupil measurements, estimated pupil size. However, because some methods to assess pupil diameter are more reliable than others, looking at the measurement setup and analysis in more detail could provide a more accurate account of the reliability of the study outcomes [13,35].…”

Section: Limitations Of the Review Processesmentioning

confidence: 99%

Inconclusive evidence that breathing shapes pupil dynamics in humans: a systematic review

Schaefer

Edwards

Nordén

et al. 2022

Pflugers Arch - Eur J Physiol

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More than 50 years ago, it was proposed that breathing shapes pupil dynamics. This widespread idea is also the general understanding currently. However, there has been no attempt at synthesizing the progress on this topic since. We therefore conducted a systematic review of the literature on how breathing affects pupil dynamics in humans. We assessed the effect of breathing phase, depth, rate, and route (nose/mouth). We followed the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines, and conducted a systematic search of the scientific literature databases MEDLINE, Web of Science, and PsycInfo in November 2021. Thirty-one studies were included in the final analyses, and their quality was assessed with QualSyst. The study findings were summarized in a descriptive manner, and the strength of the evidence for each parameter was estimated following the Grading of Recommendations Assessment, Development, and Evaluation (GRADE) approach. The effect of breathing phase on pupil dynamics was rated as “low” (6 studies). The effect of breathing depth and breathing rate (6 and 20 studies respectively) were rated as “very low”. Breathing route was not investigated by any of the included studies. Overall, we show that there is, at best, inconclusive evidence for an effect of breathing on pupil dynamics in humans. Finally, we suggest some possible confounders to be considered, and outstanding questions that need to be addressed, to answer this fundamental question. Trial registration: This systematic review has been registered in the international prospective register of systematic reviews (PROSPERO) under the registration number: CRD42022285044.

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Section: Limitations Of the Review Processesmentioning

confidence: 99%

Inconclusive evidence that breathing shapes pupil dynamics in humans: a systematic review

Schaefer

Edwards

Nordén

et al. 2022

Pflugers Arch - Eur J Physiol

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“…The detection of blinks was performed using an automatic algorithm (Hershman et al, 2018) and reviewed and corrected by visual inspection. Missing data were replaced with the average of the preceding and following five values; this process allowed us to compute the polynomial coefficients and then use these coefficients in a polynomial interpolation (Dan et al, 2020) based on the behavior of the curve. Later time series were low-pass filtered at 10 Hz (Kuipers & Thierry, 2011, 2013) to reduce extreme values generated by blinks and to capture the slow phasic response, and time series were baseline corrected using the 100 ms before the target and distractor onset (Angulo-Chavira et al, 2017; Hepach & Westermann, 2016).…”

Section: Resultsmentioning

confidence: 99%

Developmental changes in phonological and semantic priming effects in Spanish-speaking toddlers.

Arias‐Trejo¹,

Angulo‐Chavira²,

Avila-Varela³

et al. 2022

Developmental Psychology

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Research on the early lexical-semantic system has described how toddlers organize word representations based on semantic and phonological features. This study is a longitudinal investigation of the development of this organization during infancy. Middle-high socioeconomic status Mexican toddlers (n = 28, 15 female) were presented with a preferential looking task using an eye-tracker at 18, 21, and 24 months of age, manipulating semantic and phonological lexical links. The experimental task consisted of presenting an auditory label, which was phonologically or semantically related or unrelated, with a displayed target image. Mean proportion of target looking, time-course of fixations, pupillometry, and vocabulary network analysis were used to describe the properties of priming effects. The results showed that phonological priming developed earlier than semantic priming, and that they were produced by behavioral interference. In addition, pupil dilation showed differential use of cognitive effort in critical developmental periods. Finally, the density of vocabulary networks correlated with semantic effects, and vocabulary size and local network features with phonological effects. These findings extend our understanding of the development of the lexical-semantic system during infancy.

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“…After dealing with local variability, TVSK needs to be resampled in the time domain, as, due to windowing, it has a lower number of time points than the spectrogram. This was achieved using upsampling with Modified Akima piecewise cubic Hermite interpolation [ 38 , 39 , 40 ]. This method presents several advantages in comparison to other methods: It produces undulations that find a balanced middle ground between ‘spline’ and ‘pchip’ (Piecewise Cubic Hermite Interpolating Polynomial) techniques.…”

Section: Methodsmentioning

confidence: 99%

Time-Varying Spectral Kurtosis: Generalization of Spectral Kurtosis for Local Damage Detection in Rotating Machines under Time-Varying Operating Conditions

Wodecki

2021

Sensors

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Vibration-based local damage detection in rotating machines (i.e., rolling element bearings) is typically a problem of detecting low-energy cyclic impulsive modulations in the measured signal. This can be challenging as both the amplitude of a single damage-related impulse and the distance between impulses might be changing in time. From the signal processing point of view, this means time varying regarding the the signal-to-noise ratio, location of information in the frequency domain, and loss of periodicity (this remains cyclic but not periodic). One of the many attempted approaches to this problem is filtration using custom filters derived in a data-driven fashion. One of the methods to obtain such filters is a selector approach, where the value of a certain statistic is calculated for individual frequency bands of a signal that results in the magnitude response of a filter. In this approach, each chosen statistic will yield different results, and the obtained filter will be focused on different frequency bands focusing on different behaviors. One of the most popular and powerful selectors is spectral kurtosis as popularized by Antoni, which uses kurtosis as an operational statistic. Unfortunately, after closer inspection, it is easy to notice that, although selectors can significantly enhance the signal, they accumulate a great deal of noise and other background content of signals, which occupies the space (or rather time) in between the impulses. Another disadvantage is that such filters are time-invariant, because, in the principle of their construction, they are not adaptive, and even slight changes in the signal yield suboptimal results either by missing relevant data when the conditions in the signal change (i.e., informative impulses widen in bandwidth), or by accumulating unnecessary noise when the relevant information is not present (in between impulses or in frequency bands that impulses no longer occupy). To address this issue, I propose generalization of the selector approach using the example of spectral kurtosis. This assumes creating a time-varying selector that can be seen as a spatial filter in the time-frequency domain. The time-varying SK (TVSK) is estimated for segments of the signal, and, instead of a vector of SK-based filter coefficients, one obtains a TVSK-based matrix of coefficients that takes into account the time-varying properties of the signal. The obtained structure is then binarized and used as a filter. The presented method is tested using a simulated signal as well as two real-life signals measured on heavy-duty bearings in two different types of machine.

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Accuracy of Six Interpolation Methods Applied on Pupil Diameter Data

Cited by 23 publications

References 13 publications

Inconclusive evidence that breathing shapes pupil dynamics in humans: a systematic review

Inconclusive evidence that breathing shapes pupil dynamics in humans: a systematic review

Developmental changes in phonological and semantic priming effects in Spanish-speaking toddlers.

Time-Varying Spectral Kurtosis: Generalization of Spectral Kurtosis for Local Damage Detection in Rotating Machines under Time-Varying Operating Conditions

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