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Article ; Online: Learning to draw parametric faces.

Davidenko, Nicolas / Day, Jennifer

2023

Abstract: ... stimuli that non-artists could draw. In Experiment 1, participants (N = 37) completed a sequential drawing ... participants (N = 22) observed each target face for 15 s and were then given 60 s to draw it from memory ... of faces, we used the Parameterized Face Drawing (PFD) model (Day & Davidenko, Visual Cognition, 26(2), 89 ...

Abstract	Humans' ability to draw faces accurately from memory is extremely rare. One source of difficulty is the drawing process itself, which requires converting a complex, three-dimensional mental representation to a two-dimensional drawing. To simplify the drawing process and more directly assess people's recall of faces, we used the Parameterized Face Drawing (PFD) model (Day & Davidenko, Visual Cognition, 26(2), 89-99, 2018; Day & Davidenko, Journal of Vision, 19(11):7, 1-12, 2019) to generate simplified face stimuli that non-artists could draw. In Experiment 1, participants (N = 37) completed a sequential drawing-by-copying task in which they were given 60 s to draw each of 18 target faces by copying them using a stylus on a touchscreen. Following each drawing, participants were prompted to label a set of 20 key points on their drawing based on a reference face, which were used to compute the drawing's accuracy. In Experiment 2, participants (N = 22) observed each target face for 15 s and were then given 60 s to draw it from memory. In Experiment 1, the accuracy of drawings improved slightly over the course of the 18 trials, although most of the improvement occurred during the first few trials. In Experiment 2 (drawing-from-memory), there was no evidence of improvement, although the null results are tentative given the small sample size. Despite weak evidence of learning, participants' drawings captured the likeness of the target faces significantly better than chance. We discuss implications of these findings for the use of drawing as a method of face recall.
Language	English
Publishing date	2023-11-28
Publishing country	United States
Document type	Journal Article
ZDB-ID	185691-1
ISSN	1532-5946 ; 0090-502X
ISSN (online)	1532-5946
ISSN	0090-502X
DOI	10.3758/s13421-023-01498-0
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Article ; Online: N-Aryl-7-hydroxy-5-oxo-2,3-dihydro-1H,5H-pyrido-[3,2,1-ij]quinoline-6-carboxamides. The Synthesis and Effects on Urinary Output.

Ukrainets, Igor V / Sidorenko, Lyudmila V / Golik, Mykola Y / Chernenok, Igor M / Grinevich, Lina A / Davidenko, Alexandra A

Scientia pharmaceutica

2018 Volume 86, Issue 2

Abstract: Continuing a targeted search for new leading structures with diuretic action among tricyclic derivatives of hydroxyquinolines, which are of interest as potential inhibitors of aldosterone synthase, the synthesis of a series of the corresponding pyrido[3, ... ...

Abstract	Continuing a targeted search for new leading structures with diuretic action among tricyclic derivatives of hydroxyquinolines, which are of interest as potential inhibitors of aldosterone synthase, the synthesis of a series of the corresponding pyrido[3,2,1-
Language	English
Publishing date	2018-04-09
Publishing country	Switzerland
Document type	Journal Article
ZDB-ID	206865-5
ISSN	2218-0532 ; 0036-8709
ISSN (online)	2218-0532
ISSN	0036-8709
DOI	10.3390/scipharm86020012
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Article ; Online: Effect of concentration of anionic polymethine dye in poly-N-epoxypropylcarbazole polymer film composite on the spectral-luminescent properties and photoconductivity.

Davidenko, Nikolay A / Ishchenko, Alexander A / Kulinich, Andrii V / Studzinsky, Sergey L

Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy

2012 Volume 98, Page(s) 271–274

Abstract: ... based on poly-N-epoxypropylcarbazole (PEPC) doped with different content of anionic polymethine dye ... of the monomer N-methylcarbazole unit and the radical of the polymethine dye allowed us to suggest the possible ...

Abstract	The absorption, fluorescence and fluorescence excitation spectra of polymer thin film composites based on poly-N-epoxypropylcarbazole (PEPC) doped with different content of anionic polymethine dye testify to the formation of contact ion-pair associates at high concentration of the latter. The photoconductivity of such composites in the visible spectrum region is observed, despite the absence in the polymer of any fragment capable of accepting a photoexcited electron from anionic dye chromophore. Analysis of the spectral data together with DFT/B3LYP quantum-chemical calculation of the HOMO and LUMO energies of the monomer N-methylcarbazole unit and the radical of the polymethine dye allowed us to suggest the possible mechanism of internal photoeffect in the investigated composites which is based on the formation of the contact ion-pair associates.
MeSH term(s)	Anions/chemistry ; Carbazoles/chemistry ; Coloring Agents/chemistry ; Epoxy Compounds/chemistry ; Indoles/chemistry ; Luminescence ; Polymers/chemistry ; Spectrometry, Fluorescence
Chemical Substances	Anions ; Carbazoles ; Coloring Agents ; Epoxy Compounds ; Indoles ; Polymers ; VPM chloride (6441-84-5)
Language	English
Publishing date	2012-12
Publishing country	England
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ZDB-ID	210413-1
ISSN	1873-3557 ; 0370-8322 ; 0584-8539 ; 1386-1425
ISSN (online)	1873-3557
ISSN	0370-8322 ; 0584-8539 ; 1386-1425
DOI	10.1016/j.saa.2012.08.015
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Article ; Online: Subjective control of polystable illusory apparent motion: Is control possible when the stimulus affords countless motion possibilities?

Allen, Allison K / Jacobs, Matthew T / Davidenko, Nicolas

Journal of vision

2022 Volume 22, Issue 7, Page(s) 5

Abstract: ... control of IAM, in experiment 1 (n = 99) we used a motion persistence paradigm where participants are ... pattern and indicate when the motion pattern changes. Building on experiment 1, experiment 2 (n = 76 ...

Abstract	We investigate whether a new polystable illusion, illusory apparent motion (IAM), is susceptible to subjective perceptual control as has been shown in other polystable stimuli (e.g., the Necker cube, apparent motion quartets). Previous research has demonstrated that, although IAM shares some properties in common with other polystable stimuli, it also has some unique ones that make it unclear whether it should have similar susceptibility to subjective control. For example, IAM can be perceived in a countless number of directions and motion patterns (e.g., up-down, left-left, contracting-expanding, shear, diagonal). To explore perceptual control of IAM, in experiment 1 (n = 99) we used a motion persistence paradigm where participants are primed with different motion patterns and are instructed to control (change or hold) the initial motion pattern and indicate when the motion pattern changes. Building on experiment 1, experiment 2 (n = 76) brings the method more in line with previous subjective control research, testing whether participants can control their perception of IAM in a context without priming and while dynamically reporting their percepts throughout the trial. Findings from the two experiments demonstrate that participants were able to control their perception of IAM across paradigms. We explore the implications of these findings, strategies reported, and open questions for future research.
MeSH term(s)	Attention ; Humans ; Illusions ; Motion ; Motion Perception
Language	English
Publishing date	2022-06-15
Publishing country	United States
Document type	Journal Article
ZDB-ID	2106064-2
ISSN	1534-7362 ; 1534-7362
ISSN (online)	1534-7362
ISSN	1534-7362
DOI	10.1167/jov.22.7.5
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Article: The effect of social norms on vegetarian choices is moderated by intentions to follow a vegetarian diet in the future: Evidence from a laboratory and field study.

Hammami, Alya / Garcia, Armelle / Darcel, Nicolas / Higgs, Suzanne / Davidenko, Olga

Frontiers in psychology

2023 Volume 14, Page(s) 1081700

Abstract: Social norms could be a tool in dietary transition toward more sustainable diets, but the results of social norms interventions aimed at encouraging the selection of plant-based foods to date have been inconsistent. One reason for this might be because ... ...

Abstract	Social norms could be a tool in dietary transition toward more sustainable diets, but the results of social norms interventions aimed at encouraging the selection of plant-based foods to date have been inconsistent. One reason for this might be because there are important moderating factors that have yet to be investigated. Here we examine social modeling of vegetarian food choices and test whether modeling is dependent upon individual intentions to follow a vegetarian diet in the future in two different settings. In a laboratory study of 37 women, participants with low intentions to become a vegetarian consumed fewer plant-based foods in the presence of a vegetarian confederate, compared to eating alone. In an observational study of 1,037 patrons of a workplace restaurant, participants with a higher score of on vegetarian intentions had a greater likelihood of taking a vegetarian main course or starter, and a vegetarian social norm was associated with a greater likelihood of a vegetarian choice for the main course but not for the starter. These data suggest that participants with low intentions to follow a vegetarian diet may exhibit reactance against an explicit vegetarian norm in an unfamiliar context (as in Study 1) but that general norm following regardless of dietary intentions be more likely when it is conveyed implicitly in a familiar context (as in Study 2).
Language	English
Publishing date	2023-03-08
Publishing country	Switzerland
Document type	Journal Article
ZDB-ID	2563826-9
ISSN	1664-1078
ISSN	1664-1078
DOI	10.3389/fpsyg.2023.1081700
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Article: Clinical significance of lipohypertrophy without visual and palpable changes detected by ultrasonography of subcutaneous fat.

Volkova, N I / Davidenko, I Yu

Terapevticheskii arkhiv

2019 Volume 91, Issue 4, Page(s) 62–66

Abstract: Aim: To estimate clinical significance of lipohypertrophy (LH) without visual and palpable changes, detected by ultrasonography of subcutaneous fat.: Materials and methods: This study included 140 diabetic patients who received insulin in basal-bolus ...

Abstract	Aim: To estimate clinical significance of lipohypertrophy (LH) without visual and palpable changes, detected by ultrasonography of subcutaneous fat. Materials and methods: This study included 140 diabetic patients who received insulin in basal-bolus regimen. Ultrasonography of subcutaneous fat was performed for LH diagnostics in these diabetic patients. Than clinical significance of LH without visual and palpable changes was estimated. HbA1c level, fasting and postprandial glucose, episodes of hypoglycemia, body mass index (BMI) and scheme of insulinotherapy were evaluated at the moment of LH, after 3 and 6 months in all patients. Results: After changing injection sites, good results were demonstrated by measuring glucose and HbA1c level. Thus fasting glucose decreased from 9.03±1.98 mmol/l to 7.11±0.95 mmol/l (p=0.023). Postprandial glucose reduced from 10.27±2.72 mmol/l to 9.34±1.21 mmol/l (p=0.011). HbA1c level reduced from 9.27±1.75% to 7.43±1.02% (p=0.002). Also BMI decreased from 33.75±3.49 kg/m2 to 30.5±2.96 kg/m2 (p=0.018). Conclusion: LH without visual and palpable changes could worsen compensation of glycemic control and leads to hypoglycemia and chronic Somogyi rebound. So, LH without visual and palpable is as important and clinically significant as classic LH.
MeSH term(s)	Blood Glucose/analysis ; Diabetes Mellitus, Type 2/blood ; Diabetes Mellitus, Type 2/drug therapy ; Glycated Hemoglobin A/analysis ; Humans ; Hypoglycemic Agents/administration & dosage ; Hypoglycemic Agents/adverse effects ; Hypoglycemic Agents/therapeutic use ; Insulin/administration & dosage ; Insulin/adverse effects ; Insulin/therapeutic use ; Lipodystrophy/blood ; Lipodystrophy/chemically induced ; Subcutaneous Fat/diagnostic imaging ; Ultrasonography/methods
Chemical Substances	Blood Glucose ; Glycated Hemoglobin A ; Hypoglycemic Agents ; Insulin
Language	English
Publishing date	2019-05-16
Publishing country	Russia (Federation)
Document type	Journal Article
ZDB-ID	40718-5
ISSN	2309-5342 ; 0040-3660
ISSN (online)	2309-5342
ISSN	0040-3660
DOI	10.26442/00403660.2019.04.000128
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Article ; Online: Parametric face drawings: A demographically diverse and customizable face space model.

Day, Jennifer / Davidenko, Nicolas

Journal of vision

2019 Volume 19, Issue 11, Page(s) 7

Abstract: We introduce a novel face space model-parametric face drawings (or PFDs)-to generate schematic, though realistic, parameterized line drawings of faces based on the statistical distribution of human facial features. A review of existing face space models ( ...

Abstract	We introduce a novel face space model-parametric face drawings (or PFDs)-to generate schematic, though realistic, parameterized line drawings of faces based on the statistical distribution of human facial features. A review of existing face space models (including FaceGen Modeller, Synthetic Faces, MPI, and active appearance model) indicates that current models are constrained by their reliance on ethnically homogeneous face databases. This constraint has led to negative consequences for underrepresented populations, such as impairments in automatized identity recognition of certain demographic groups. Our model is based on a demographically diverse sample of 400 faces (200 female, 200 male; 100 East Asian/Pacific Islander, 100 Latinx/Hispanic, 100 black/African-American, and 100 white/Caucasian) compiled from several face databases (including FERET face recognition technology and the Chicago Face Database). Each front-view face image is manually coded with 85 landmark points that are then normalized and rendered with MATLAB (MathWorks, Natick, MA) tools to produce a smooth, parameterized face line drawing. We present data from two behavioral experiments to validate our model and demonstrate its applicability. In Experiment 1 we show that PFDs produce a reliable "inversion effect" in short-term recognition, a hallmark of holistic processing. In Experiment 2, we conduct a celebrity recognition task, comparing performance on PFDs to performance on untextured renderings from FaceGen Modeller. Participants successfully recognized approximately 50% of celebrity faces based on the PFD models, comparable to performance based on FaceGen Modeler (also 50% correct). We highlight a range of potential applications of our model, list some limitations, and provide MATLAB resources for researchers to utilize our face space, including the ability to customize the demographic makeup of the face space, add new faces, and produce morphs and caricatures.
MeSH term(s)	Adolescent ; Adult ; Aged ; Art ; Continental Population Groups/psychology ; Demography ; Face/physiology ; Facial Recognition/physiology ; Female ; Humans ; Male ; Middle Aged ; Young Adult
Language	English
Publishing date	2019-09-18
Publishing country	United States
Document type	Journal Article
ZDB-ID	2106064-2
ISSN	1534-7362 ; 1534-7362
ISSN (online)	1534-7362
ISSN	1534-7362
DOI	10.1167/19.11.7
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Article ; Online: Reading sideways: Effects of egocentric and environmental orientation in a lexical decision task.

Davidenko, Nicolas / Ambard, Alexander

Vision research

2018 Volume 153, Page(s) 7–12

Abstract: ... in increments of 22.5°. A control group of participants (N = 66) completed the task while sitting upright, and ... an experimental group (N = 43) completed the task while lying sideways on their right side. The function relating ...

Abstract	Many image-level factors affect reading speed and comprehension, including the in-plane orientation of text. As words' angular deviation from upright increases, so do response times. Here we investigated whether these orientation effects in reading are based purely on an egocentric (retinal) reference frame, or whether there is also a contribution of the environmental reference frame. Participants completed a lexical decision task with six-letter, two-syllable words and nonwords presented at a wide range of angles, in increments of 22.5°. A control group of participants (N = 66) completed the task while sitting upright, and an experimental group (N = 43) completed the task while lying sideways on their right side. The function relating the egocentric orientation of strings to response times was symmetric for upright observers, but skewed for observers who lay sideways, with an advantage for responding to environmentally upright text. Our results suggest that sideways readers may use an oblique reference frame (similar to the perceptual upright) for mentally rotating text. We discuss implications for designing optimal text orientations in head mounted displays.
MeSH term(s)	Adolescent ; Adult ; Decision Making ; Female ; Humans ; Male ; Orientation, Spatial/physiology ; Pattern Recognition, Visual/physiology ; Reaction Time ; Reading ; Young Adult
Language	English
Publishing date	2018-09-25
Publishing country	England
Document type	Journal Article
ZDB-ID	200427-6
ISSN	1878-5646 ; 0042-6989
ISSN (online)	1878-5646
ISSN	0042-6989
DOI	10.1016/j.visres.2018.08.006
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Article: 2-Bromo-methyl-N-isopropyl-7,8-dimeth-oxy-1,2-dihydro-1,3-oxazolo[3,2-a]quinoline-4-carboxamide.

Shishkina, Svetlana V / Shishkin, Oleg V / Ukrainets, Igor V / Bereznyakova, Nataliya L / Davidenko, Alexandra A

Acta crystallographica. Section E, Structure reports online

2008 Volume 64, Issue Pt 6, Page(s) o1031

Abstract: In the title compound, C(18)H(21)BrN(2)O(5), conjugation between the π-donating N-C-O fragment and ... within the dihydropyridinol ring. This effect is also promoted by the formation of an intra-molecular N-H⋯O hydrogen bond ...

Abstract	In the title compound, C(18)H(21)BrN(2)O(5), conjugation between the π-donating N-C-O fragment and the π-withdrawing carbonyl group results in considerable redistribution of the electron density within the dihydropyridinol ring. This effect is also promoted by the formation of an intra-molecular N-H⋯O hydrogen bond. The five-membered heterocycle is disordered over two envelope conformations in a 0.35:0.65 ratio.
Language	English
Publishing date	2008-05-10
Publishing country	United States
Document type	Journal Article
ZDB-ID	2041947-8
ISSN	1600-5368
ISSN	1600-5368
DOI	10.1107/S1600536808013378
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Article ; Online: Dissociating Higher and Lower Order Visual Motion Systems by Priming Illusory Apparent Motion.

Heller, Nathan H / Davidenko, Nicolas

Perception

2018 Volume 47, Issue 1, Page(s) 30–43

Abstract: Motion processing is thought of as a hierarchical system composed of higher and lower order components. Past research has shown that these components can be dissociated using motion priming paradigms in which the lower order system produces negative ... ...

Abstract	Motion processing is thought of as a hierarchical system composed of higher and lower order components. Past research has shown that these components can be dissociated using motion priming paradigms in which the lower order system produces negative priming while the higher order system produces positive priming. By manipulating various stimulus parameters, researchers have probed these two systems using bistable test stimuli that permit only two motion interpretations. Here we employ maximally ambiguous test stimuli composed of randomly refreshing pixels in a task that allows observers to report more than just two types of motion percepts. We show that even with such stimuli, motion priming can constrain the unstructured random pixel patterns into coherent percepts of positive or negative apparent motion. Moreover, we find that the higher order system is uniquely susceptible to cognitive influences, as evidenced by a significant suppression of positive priming in the presence of alternative response options.
MeSH term(s)	Humans ; Illusions ; Motion Perception ; Photic Stimulation ; Repetition Priming ; Uncertainty
Language	English
Publishing date	2018-01
Publishing country	United States
Document type	Journal Article
ZDB-ID	185533-5
ISSN	1468-4233 ; 0301-0066
ISSN (online)	1468-4233
ISSN	0301-0066
DOI	10.1177/0301006617731007
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