scholarly journals Correcting for physical distortions in visual stimuli improves reproducibility in zebrafish neuroscience

eLife ◽  
2020 ◽  
Vol 9 ◽  
Author(s):  
Timothy W Dunn ◽  
James E Fitzgerald
Keyword(s):  
Experimental Design ◽  
Receptive Field ◽  
Escape Behavior ◽  
Visual Stimuli ◽  
Computational Tool ◽  
Visual Neuroscience ◽  
Optical Media ◽  
Optical Refraction ◽  
And Control ◽  
Interface Geometry

Optical refraction causes light to bend at interfaces between optical media. This phenomenon can significantly distort visual stimuli presented to aquatic animals in water, yet refraction has often been ignored in the design and interpretation of visual neuroscience experiments. Here we provide a computational tool that transforms between projected and received stimuli in order to detect and control these distortions. The tool considers the most commonly encountered interface geometry, and we show that this and other common configurations produce stereotyped distortions. By correcting these distortions, we reduced discrepancies in the literature concerning stimuli that evoke escape behavior, and we expect this tool will help reconcile other confusing aspects of the literature. This tool also aids experimental design, and we illustrate the dangers that uncorrected stimuli pose to receptive field mapping experiments.

scholarly journals Correcting for physical distortions in visual stimuli improves reproducibility in zebrafish neuroscience

2019 ◽  
Author(s):  
Timothy W. Dunn ◽  
James E. Fitzgerald
Keyword(s):  
Single Neuron ◽  
Escape Behavior ◽  
Neural Mechanisms ◽  
Neuron Activity ◽  
Visually Guided ◽  
Computational Tool ◽  
Larval Zebrafish ◽  
Air Water Interface ◽  
And Control ◽  
Single Neuron Activity

Breakthrough technologies for monitoring and manipulating single-neuron activity provide unprecedented opportunities for whole-brain neuroscience in larval zebrafish1–9. Understanding the neural mechanisms of visually guided behavior also requires precise stimulus control, but little prior research has accounted for physical distortions that result from refraction and reflection at an air-water interface that usually separates the projected stimulus from the fish10–12. Here we provide a computational tool that transforms between projected and received stimuli in order to detect and control these distortions. The tool considers the most commonly encountered interface geometry, and we show that this and other common configurations produce stereotyped distortions. By correcting these distortions, we reduced discrepancies in the literature concerning stimuli that evoke escape behavior13,14, and we expect this tool will help reconcile other confusing aspects of the literature. This tool also aids experimental design, and we illustrate the dangers that uncorrected stimuli pose to receptive field mapping experiments.

The Effect of Applying POSSE (Predict- Organize-Search-Summarize-Evaluate) on the Students’ Reading Comprehension

2013 ◽  
Vol 2 (1) ◽  
Author(s):  
Eka Rejeki Maha ◽  
Berlin Sibarani
Keyword(s):  
Reading Comprehension ◽  
Experimental Design ◽  
Null Hypothesis ◽  
Alternative Hypothesis ◽  
Choice Test ◽  
Control Group ◽  
Multiple Choice Test ◽  
Level Of Significance ◽  
And Control ◽  
Experimental Group

This study was aimed at finding out The Effect of Applying POSSE (Predict-Organize-Search-Summarize-Evaluate) Strategy on the Students’ Reading Comprehension. This study used the experimental design. The population of this study was the students of SMA Negeri 2 Medan. There were sixty students taken as the sample of the research. This study was conducted with two randomized groups namely experimental and control group. The experimental group was taught by applying POSSE strategy while control group was taught without applying POSSE strategy. The instrument of collecting the data was multiple choice test which consists of 40 items. To obtain the reliability of the test, the researcher used Kuder-Richardson (KR-21). The calculation shows the reliability was 0.81(high). The data were analyzed by using t-test. The calculation shows that t-observed (4.76) is higher than t-table (2.00) at the level of significance (α) 0.05 with the degree of freedom (df) 58. Therefore, the null hypothesis (Ho) is rejected and alternative hypothesis (Ha) is accepted. It means that there was a significant effect of applying POSSE strategy on the students’ reading comprehension. Keywords: POSSE Strategy, Reading Comprehension.

THE EFFECT OF RAP (READ, ASK, PARAPHRASE) STRATEGY ON STUDENTS’ READING COMPREHENSION IN READING ANALYTICAL EXPOSITION TEXT

2015 ◽  
Vol 4 (3) ◽  
Author(s):  
Veronika N. And Lince Sihombing
Keyword(s):  
Reading Comprehension ◽  
Experimental Design ◽  
T Test ◽  
Control Group ◽  
Multiple Choice Tests ◽  
Choice Tests ◽  
Second Year ◽  
Level Of Significance ◽  
And Control ◽  
Experimental Group

This study focused on finding out the effect of applying RAP (Read, Ask,Paraphrase) Strategy on students’ reading comprehension in reading analyticalexposition text. This study was conducted in experimental design. The populationof this research was the second year of students in SMA Swasta Katolik BudiMurni 2 Medan. There were seventy students of the second year senior highschool students as the sample of the research. This study was conducted with tworandomized groups namely Experimental Group and Control Group. Theexperimental group was taught by applying RAP Strategy, while the control groupwas taught by applying conventional strategy. The instrument of collecting thedata was multiple choice tests which consisted of 25 items. The data wereanalyzed by using t-test formula. The calculation shown that t-observed (5.36)was higher than t-table (1.994) at the level of significance (α) 0.05 with the degreeof freedom (df) 68. It means that there was a significant effect of applying RAPStrategy on students’ reading comprehension in reading analytical exposition text.

THE ROLE OF WHATSAPP IN TEACHING VOCABULARY TO THE STAFFS OF UMBUL PONGGOK KLATEN

2021 ◽  
Vol 5 (2) ◽  
pp. 773
Author(s):  
Lia Ardiana Safitri
Keyword(s):  
Experimental Design ◽  
Foreign Language ◽  
Random Sampling ◽  
Sampling Procedure ◽  
Assessment Instrument ◽  
Vocabulary Test ◽  
Control Groups ◽  
Post Test ◽  
And Control

This study was conducted with the aim of knowing the significant role of WhatsApp in teaching vocabulary, especially staff learning achievement which was limited to vocabulary achievement as measured by a vocabulary test at Umbul Ponggok Klaten. Participants in this study amounted to 30 people consisting of 15 men and 15 women. All participants will learn English as a foreign language using WhatsApp to learn new vocabulary items via their mobile, tablet or laptop. Participants' English level will be measured. Random sampling procedure was carried out. To carry out the research, a true experimental design was used. The participants were assigned to two experimental and control groups. The assessment instrument in this study used a pre-test and post-test. The results showed that the use of the WhatsApp application in teaching vocabulary to the Umbul Ponggok Klaten staff was able to improve the achievement of new English vocabulary mastery of the Umbul Ponggok Klaten staff which was getting better.

scholarly journals THE EFFECTIVENESS OF REALISTIC MATHEMATICS EDUCATION TO IMPROVE STUDENTS’ MULTI-REPRESENTATION ABILITY

2019 ◽  
Vol 8 (1) ◽  
pp. 21 ◽  
Author(s):  
Muhtarom Muhtarom ◽  
Nizaruddin Nizaruddin ◽  
Farida Nursyahidah ◽  
Nurina Happy
Keyword(s):  
Mathematics Education ◽  
Experimental Design ◽  
Learning Process ◽  
Realistic Mathematics Education ◽  
Student Responses ◽  
Realistic Mathematics ◽  
Quasi Experimental ◽  
And Control ◽  
Essay Test ◽  
Better Than

This research aimed to evaluate the effectiveness of Realistic Mathematics Education (RME) to improve students' multi-representation ability. A quasi-experimental design was used in this research. Sixty-four samples from the seventh-grade students of Junior School were randomly selected and divided into two classes: experimental class was treated using RME and control class was treated using conventional learning, with each class consisting of thirty-two students. The essay test was used to measure the multi-representation ability of students and the questionnaire was used to measure students' responses in RME learning. The data from the essay test were analyzed by N-Gain test and t-test in which normality and homogenity test were conducted previously, while the students' learning completeness and student responses were presented descriptive quantitative. The result of the research concluded that the multi-representation ability of students who get RME learning is better than the multi-representation ability in students who get conventional learning. 87.25% of students who get RME learning with the developed device have completed the KKM, and many students are very enthusiastic and interested in RME based learning, thus increasing their learning spirit in a learning process.

scholarly journals Problem-Based Learning Strategy in Improving Students’ Skill in Performing a Speech

2018 ◽  
Vol 1 (1) ◽  
pp. 13-27
Author(s):  
Hilmiyah Akib ◽  
Abd. Rauf Ibrahim
Keyword(s):  
Experimental Design ◽  
Teaching And Learning ◽  
Learning Strategy ◽  
Problem Based Learning ◽  
The People ◽  
Twelfth Grade ◽  
Quasi Experimental ◽  
Contextual Teaching ◽  
And Control

This study focused on students’ skill in performing a speech and had conducted based on the problem. The students think performing a speech is the difficult thing, the students think there are problems appear when the students perform a speech in front of the people, suddenly forgetting the script, getting anxious, and getting blank. The researcher considered to conduct this study when doing observation at MAN 2 Parepare since the students showed fair competence in performing a speech. The objective of the study is to give some abilities and knowledge in this case Contextual Teaching and Learning that focused in Problem-based. The study applied quasi-experimental design, with two groups namely experimental class and control class. The populations of the study were the twelfth grade students at MAN 2 Parepare where the total numbers were 84 students. The samples of the study were consisted of 39 students. The result showed that the students’ skill in performing a speech of the twelfth grade students of MAN 2 Parepare could be improved through Problem-Based Learning Strategy. In performing s speech, the speakers need to be brave, except having some abilities in performing a speech.

scholarly journals EFFECTIVENESS OF INDIAN FOLKLORE ANIMATION ON MOTIVATION AMONG YEAR FIVE PUPILS IN KULIM DISTRICT

2020 ◽  
Vol 2 (7) ◽  
pp. 01-12
Author(s):  
Chitra Suparmaniam ◽  
Maizatul Hayati Mohamad Yatim
Keyword(s):  
Experimental Design ◽  
Research Methodology ◽  
Quantitative Data ◽  
Qualitative Data ◽  
Moral Values ◽  
Control Group ◽  
Arcs Model ◽  
Post Test ◽  
And Control

The article discusses a study to measure the effectiveness of Indian Folklore Animation among Year Five SJK(T) pupils in the Kulim district. The study uses qualitative data for exploring twelve principles of animation and quantitative data for the research methodology approach. For qualitative data, ten animators were selected to analyse the twelve principles of animation in three series of selected Indian Folklore Animation using an animation principles checklist. For quantitative data, a pre-test post-test experimental design was used to measure the effectiveness of Indian Folklore Animation using a questionnaire. The questionnaire consists of four scales of Keller’s ARCS Model of Motivation. A total of 108 pupils from three schools was selected as respondents and were assigned into two groups (treatment and control group) consisted of 54 pupils each. Data collected were analysed using descriptive and inference statistics to answer the listed research objectives. Findings show that there are significant differences in mean scores for pre-test and post-test to show that the Indian Folklore gave motivational effects to the pupils. This implies that Indian Folklore Animation could be developed for Indian Folklore appreciations and for fostering good moral values through animation.

scholarly journals Effectiveness of employing the enrichment activities of mental thinking on the development of thinking and mathematical achievement among the students of the second cycle Education has been essential: فاعلية توظيف الأنشطة الإثرائية للتفكير الذهني في تنمية التفكير والتحصيل الرياضي لدى طلاب الحلقة الثانية من التعليم الأساسي

2019 ◽  
Vol 3 (28) ◽  
Author(s):  
Salim Ahmed Saif Al-rashdi
Keyword(s):  
Experimental Design ◽  
Mathematical Thinking ◽  
Achievement Test ◽  
Cognitive Achievement ◽  
Control Group ◽  
Control Groups ◽  
Significant Difference ◽  
The Mean ◽  
And Control ◽  
Experimental Group

    The present study aimed at uncovering the effectiveness of employing the enrichment activities for mental thinking on the development of mathematical thinking and achievement among Grade 7 students. To achieve the research objectives, the researcher used the semi experimental design known as the design of the control group with the tribal and remote tests. In light of the experimental design, the average Grade 7 students tested the sample of the study in the second semester of 30 students who were divided into 15 students for the experimental group and 15 students for the control group after checking the validity and stability of the tools. The results showed that there was a statistically significant difference at (0.05) between the mean scores of the experimental and control groups in the cognitive achievement test related to the unit of Engineering in the second semester and the mathematical thinking test for the average of the experimental group. The results also showed a statistically significant difference) between the average scores of the experimental group students in the tribal and remote applications in the cognitive achievement test and the mathematical thinking test, and in favor of the average post-implementation. In the light of these results, the study presented a number of recommendations and suggestions.   ، ، ، ،

Comparison of the Effect Of Three Methods of Creativity Development in Elementary Students in Tehran City

2013 ◽  
Vol 4 (1) ◽  
pp. 88-96
Author(s):  
Mehrnaz Azadyekta
Keyword(s):  
Experimental Design ◽  
Elementary Students ◽  
Control Group ◽  
Control Groups ◽  
Creativity Training ◽  
Creativity Development ◽  
Significant Difference ◽  
And Control

Objectivity: This research was conducted with the objective of examining the effect of three methods of creativity development (brain storming, forced association and synectics) on creativity development in elementary students in Tehran city. Method: The present study was a pretest-posttest experimental design with control group. To measure the dependent variable, creativity, Torance Tests of creativity thinking (Form B) were used. In this study 160 students (80 boy, 80 girl) were randomly selected and divided into four groups (brain storming, forced association, synectics and control group).Results: Results revealed significant difference between pretest and posttest scores of all groups except the control group (brain storming P<0.01,forced association P<0.05,synectics P<0.01). Also, the different between the methods of creativity development was not significant. In other words. none of the creativity methods were superior to the others. However, there was a significant difference between the control groups (P<0.001). Conclusion: Regardless of the method, creativity training can lead to an increase in students creativity.

Designing Experiments

2015 ◽  
pp. 82-96
Keyword(s):  
Experimental Design ◽  
Internal Validity ◽  
Random Selection ◽  
Experimental Designs ◽  
Control Groups ◽  
Test Measurement ◽  
Post Test ◽  
Quasi Experimental ◽  
And Control

In this chapter, students will learn the process of designing experiments. The classic experimental design is presented first. Following this, three distinct quasi-experimental designs are presented. The benefits and burdens of the classic and quasi-experimental designs are discussed in depth. By the end of this chapter, students will understand concepts related to random selection, generalizability, treatment and control groups, pre- and post-test measurement of the dependent variable, and internal validity.

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