Observing Behavior in the Albino Rat: A Within-Subjects' Comparison of Increasing Levels of Visual Complexity

1975 ◽  
Vol 41 (2) ◽  
pp. 523-529 ◽  
Author(s):  
Joel Burkholder ◽  
Robert Deitchman ◽  
Richard H. Haude ◽  
Raymond E. Sanders
Keyword(s):  
Visual Complexity ◽  
Analysis Of Covariance ◽  
Albino Rats ◽  
Viewing Time ◽  
Stimulus Complexity ◽  
Albino Rat ◽  
Within Subjects ◽  
Photographic Slides ◽  
Complexity Preference ◽  
The Relationship

54 male CD strain Charles River albino rats were tested for complexity preference using a non-locomotor response. Each subject was presented an array of photographic slides containing an incremental series of complexity elements, i.e., 1, 2, 5 and 25 elements. All photographic slides were randomized both within and across subjects. Each photographic slide of each level of complexity was repeated three times. Results of an analysis of covariance, with luminance as the covariate, showed that cumulative viewing time increased with an increase in stimulus complexity. The relationship between looking and level of complexity was shown to be different when covariance procedures were used than without them.

Varying Degrees of Complexity and Isolation in Visual Exploration

1974 ◽  
Vol 38 (3) ◽  
pp. 787-794 ◽  
Author(s):  
L. Charles Lemond ◽  
Robert L. Durham ◽  
Gail P. Slater ◽  
William H. Wilson ◽  
Jum C. Nunnally
Keyword(s):  
Visual Exploration ◽  
Viewing Time ◽  
Stimulus Complexity ◽  
The Relationship

In two experiments viewing times were measured while Ss looked at random geometric forms. Stimuli were constructed to represent increasing levels of complexity. In both experiments, the relationship between level of stimulus complexity and viewing time was monotonic and increasing. The results are interpreted as supporting a meaning-processing model of visual exploration rather than theories concerning optimal levels of stimulation.

Effects of Dihydroquercetin on Behavior of Albino Rat Offspring with Transgenerational Chemical Body Burden

2020 ◽  
pp. 38-41
Author(s):  
E.A. Kapustina ◽  
L.G. Lisetskaya
Keyword(s):  
Physical Activity ◽  
Open Field ◽  
Antioxidant Properties ◽  
Body Burden ◽  
Statistical Processing ◽  
Lead Toxicity ◽  
Absorption Spectrometry ◽  
Albino Rats ◽  
Albino Rat ◽  
Rat Offspring

Introduction. Lead pollution is a common environmental problem. Having no physiological functions, this toxicant has a negative polytropic impact on a body, including neurotoxic, reproductive, and transgenerational effects. The mechanism of lead toxicity is oxidative stress. Flavonoids have active antioxidant properties. They are widely represented in plant foods, are able to restore protective capabilities of cells and have chelating properties with respect to lead. One of the representatives of this group of substances is dihydroquercetin. The objective was to study the effect of dihydroquercetin on behavior of rats with hereditary chemical body burden exposed to lead at 60 mg/kg during 25 days. Materials and methods. We studied the behavior of rat offspring in an open field and established their blood lead levels by electrothermal atomization atomic absorption spectrometry. For statistical processing the U-Mann – Whitney test was used. Results. In the present experiment, the effect of lead on the offspring of male albino rats exposed to 60 mg/kg of lead for 25 days caused changes in the activity of animals in the open field. The severity of changes was more pronounced in animals with a hereditary chemical body burden. These animals showed a decrease in orientation and physical activity and increased anxiety. In rats with a hereditary burden, changes in behavior were detected when administering dihydroquercetin. The activity of animals demonstrated a positive dynamics: we observed a statistically significant increase in physical activity and orientation. The number and duration of behavioral acts approached control values. Conclusions. The revealed effects of lead on the offspring of albino rats with a transgenerational chemical body burden require further study to understand the mechanism of the phenomenon.

scholarly journals Cross-Sectional Associations between Mothers and Children’s Breakfast Routine—The Feel4Diabetes-Study

Nutrients ◽  
2021 ◽  
Vol 13 (3) ◽  
pp. 720
Author(s):  
Natalia Giménez-Legarre ◽  
Alba M. Santaliestra-Pasías ◽  
Greet Cardon ◽  
Rurik Imre ◽  
Violeta Iotova ◽  
...  
Keyword(s):  
Dairy Products ◽  
Analysis Of Covariance ◽  
Food Groups ◽  
Whole Grain ◽  
Cross Sectional ◽  
Cereal Products ◽  
Breakfast Consumption ◽  
Mothers And Children ◽  
Relationship Of ◽  
The Relationship

Positive influences of family members have been associated with a high probability of children’s daily breakfast consumption. Therefore, the aim of this study was to scrutinize the association of breakfast routines between mothers and their children. The baseline data of the Feel4Diabetes-study was obtained in 9760 children (49.05% boys)–mother pairs in six European countries. A parental self-reported questionnaire gauging the frequency of breakfast consumption and of breakfast´ foods and beverages consumption was used. Agreement in routines of mothers and their children’s breakfast consumption was analyzed in sex-specific crosstabs. The relationship of breakfast routine and food groups’ consumption between mothers and their children was assessed with analysis of covariance. The highest proportion of children who always consumed breakfast were those whose mothers always consumed it. Children consuming breakfast regularly had a higher intake of milk or unsweetened dairy products and all kind of cereal products (low fiber and whole-grain) than occasional breakfast consumers (p < 0.05). The strong similarity between mothers and children suggests a transfer of breakfast routine from mothers to their children, as a high proportion of children who usually consume breakfast were from mothers also consuming breakfast. All breakfast foods and beverages consumption frequencies were similar between children and their mothers.

Sleep symptomatology is associated with greater subjective cognitive concerns: Findings from the community-based Healthy Brain Project

SLEEP ◽  
2021 ◽  
Author(s):  
Jessica Nicolazzo ◽  
Katharine Xu ◽  
Alexandra Lavale ◽  
Rachel Buckley ◽  
Nawaf Yassi ◽  
...  
Keyword(s):  
Cognitive Function ◽  
Sleep Quality ◽  
Cognitive Performance ◽  
Sex Education ◽  
Severity Index ◽  
Analysis Of Covariance ◽  
Psychomotor Function ◽  
Community Based ◽  
The Relationship ◽  
Insomnia Severity

Abstract Study objectives To examine if sleep symptomatology was associated with subjective cognitive concerns or objective cognitive performance in a dementia-free community-based sample. Methods A total of 1421 middle-aged participants (mean±standard deviation = 57±7; 77% female) from the Healthy Brain Project completed the Pittsburgh Sleep Quality Index (PSQI), Insomnia Severity Index (ISI), and Epworth Sleepiness Scale (ESS) to measure sleep quality, insomnia symptom severity, and daytime sleepiness, respectively. Participants were classified as having no sleep symptomatology (normal scores on each sleep measure), moderate sleep symptomatology (abnormal scores on one sleep measure), or high sleep symptomatology (abnormal scores on at least two sleep measures), using established cut-off values. Analysis of covariance was used to compare objective cognitive function (Cogstate Brief Battery) and subjective cognitive concerns (Modified Cognitive Function Instrument) across groups. Results Following adjustments for age, sex, education, mood, and vascular risk factors, persons classified as having high sleep symptomatology, versus none, displayed more subjective cognitive concerns (d=0.24) but no differences in objective cognitive performance (d=0.00-0.18). Subjective cognitive concerns modified the association between sleep symptomatology and psychomotor function. The strength of the relationship between high sleep symptomatology (versus none) and psychomotor function was significantly greater in persons with high as compared with low cognitive concerns (β±SE =-0.37±0.16; p=0.02). Conclusions More severe sleep symptomatology was associated with greater subjective cognitive concerns. Persons reporting high levels of sleep symptomatology may be more likely to display poorer objective cognitive function in the presence of subjective cognitive concerns.

Effect of Morphine Sulfate on Spontaneous Activity Level of the Albino Rat

1965 ◽  
Vol 16 (3) ◽  
pp. 693-696 ◽  
Author(s):  
L. Glenn Collins
Keyword(s):  
Drug Effect ◽  
Activity Wheel ◽  
Activity Level ◽  
Morphine Sulfate ◽  
Albino Rats ◽  
Systematic Effect ◽  
General Activity ◽  
Albino Rat ◽  
General Activity Level ◽  
Hunger Drive

In two experiments involving 40 albino rats and two dosage levels of morphine sulfate it was found that relatively high analgesic dosages of morphine significantly depressed general activity level in the revolving drum. Also, there was a significant interaction between drug effect and hunger drive. In the case of moderate analgesic doses (7 mg/kg) no systematic effect of morphine on activity-wheel performance was noted.

scholarly journals CHRONIC SODIUM CHLORIDE TOXICITY IN THE ALBINO RAT

1953 ◽  
Vol 98 (1) ◽  
pp. 71-80 ◽  
Author(s):  
George R. Meneely ◽  
Robert G. Tucker ◽  
William J. Darby ◽  
Stewart H. Auerbach
Keyword(s):  
Blood Pressure ◽  
Sodium Chloride ◽  
Relative Volume ◽  
Dietary Sodium ◽  
Albino Rats ◽  
Albino Rat ◽  
Positive Linear Correlation ◽  
Ad Libitum ◽  
Histologic Changes ◽  
Dietary Sodium Chloride

Sustained arterial hypertension developed in male, albino rats chronically fed diets rich in sodium chloride with demineralized drinking water available ad libitum. After 12 months of the experimental regimen a positive, linear correlation (r = 0.91) was found between the systolic blood pressure and the concentration of sodium chloride in the diet. A syndrome of edema and renal failure was observed in 18 per cent of the group fed at the level of 7.0 to 9.8 per cent of sodium chloride. Significant histologic changes occurred in the kidneys and certain other organs in rats consuming rations containing these levels of NaCl. The relative volume of the radiosodium space was increased in the rat by high dietary sodium chloride.

Visual thresholds in albino and pigmented rats

1992 ◽  
Vol 9 (3-4) ◽  
pp. 409-414 ◽  
Author(s):  
Pilar Herreros De Tejada ◽  
Daniel G. Green ◽  
Carmen Muñoz Tedó
Keyword(s):  
Evoked Potentials ◽  
Superior Colliculus ◽  
Absolute Threshold ◽  
Albino Rats ◽  
Response Curves ◽  
Albino Rat ◽  
A Value ◽  
Visual Evoked Cortical Potential ◽  
Single Unit Recordings ◽  
Visual Evoked

AbstractAlbino rats have recently been reported to have increment thresholds against dim backgrounds that are two log units higher than those of pigmented rats. We, on the other hand, have failed to confirm these differences using electroretinogram b waves and pupillary light reflexes. This paper reports on experiments using evoked potentials from cortex and colliculus and single-unit recordings from colliculus.We recorded visual-evoked potentials from cortex and superior colliculus in the strains of albino (CD) and pigmented (Long-Evans) rats used in the earlier studies. Thresholds were determined on eight fully dark-adapted animals by extrapolating intensity-response curves to the point at which there was zero evoked potential. The average dark-adapted threshold for the visual-evoked cortical potential was —5.26 log cd/m2in pigmented and —5.80 log cd/m2 in albino animals. The average dark-adapted threshold for the superior colliculus evoked response was —5.54 log cd/m2 in pigmented and —5.84 log cd/m2 in albinos. The differences were not statistically significant. On the same apparatus, the average absolute threshold for three human observers was —5.3 log cd/m2, a value close to the rat dark-adapted thresholds. Thus, visual-evoked cortical potentials and superior collicular evoked potentials failed to confirm the report of higher dark-adapted thresholds for albinos. In addition, we find that single units in superior colliculus in the albino rat respond to very dim flashes.

The Power of Followers That do not Follow: Investigating the Effects of Follower Resistance, Leader Implicit Followership Theories and Leader Negative Affect on the Emergence of Destructive Leader Behavior

2021 ◽  
pp. 154805182110124
Author(s):  
Amelie V. Güntner ◽  
Kai N. Klasmeier ◽  
Florian E. Klonek ◽  
Simone Kauffeld
Keyword(s):  
Negative Affect ◽  
Leader Behavior ◽  
Destructive Leadership ◽  
Causal Inferences ◽  
Within Subjects ◽  
The Impact ◽  
Analytical Approaches ◽  
The Relationship ◽  
Implicit Followership Theories ◽  
Theory X

This study focuses on follower resistance as a potential antecedent of destructive leader behavior and examines leader-related moderators and mediators to help explain the relationship between follower resistance and destructive leader behavior. Drawing from implicit followership theories, we propose that the relationship between follower resistance and destructive leader behavior is moderated by leaders’ Theory X schema. Furthermore, we build on affective events theory to hypothesize that follower resistance increases destructive leader behavior via leaders’ negative affect. We tested our hypotheses in a within-subjects online field experiment. Our study findings demonstrate that follower resistance increases destructive leader behavior and that this relationship is mediated through leaders’ negative affect and moderated by leaders’ Theory X schema. We discuss theoretical implications regarding the impact of (resistant) follower behavior on destructive leadership and offer methodological advances in terms of research design and analytical approaches to deal with endogeneity issues and derive causal inferences. Lastly, we derive practical implications for utilizing follower resistance.

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