The Effect of Risk Perception and Cognitive Biases on the Evaluation of Opportunity in Family and Non-Family Entrepreneurs: The Case of Tunisian Entrepreneurs

2016 ◽  
Vol 24 (03) ◽  
pp. 281-312 ◽  
Author(s):  
Najoua Dali ◽  
Sana Harbi
Keyword(s):  
Regression Analysis ◽  
Risk Perception ◽  
Cognitive Biases ◽  
Illusion Of Control ◽  
Test Hypothesis ◽  
Significant Difference ◽  
Structural Regression ◽  
Opportunity Evaluation ◽  
The Law

This study uses cognitive biases to examine opportunity evaluation among family and non-family entrepreneurs, and investigated the effect of risk perception in this type of entrepreneurs. The aim of this paper is to examine empirically if family entrepreneurs differ in terms of risk perception and opportunity evaluation from non-family entrepreneurs. We use a sample of 144 established businesses to run both test hypothesis and regression analysis. Our results indicate that there is no significant difference between the two categories of entrepreneurs. The structural regression analysis suggests that risk perception mediates opportunity evaluation and that (i) the belief in the law of small numbers and (ii) the illusion of control decreases risk perception among entrepreneurs when evaluating an opportunity.

Opportunity Evaluation under Risky Conditions: The Cognitive Processes of Entrepreneurs

2002 ◽  
Vol 27 (2) ◽  
pp. 125-148 ◽  
Author(s):  
Hean Tat Keh ◽  
Maw Der Foo ◽  
Boon Chong Lim
Keyword(s):  
Risk Perception ◽  
Cognitive Processes ◽  
Opportunity Recognition ◽  
Illusion Of Control ◽  
Risk Propensity ◽  
Cognitive Approach ◽  
Independent Variables ◽  
Planning Fallacy ◽  
Opportunity Evaluation ◽  
The Law

Even though the entrepreneurship literature places much emphasis on opportunity recognition, little is known about how entrepreneurs actually evaluate opportunities. This study uses a cognitive approach to examine opportunity evaluation, as the perception of opportunity is essentially a cognitive phenomenon. We present a model that consists of four independent variables (overconfidence, belief in the law of small numbers, planning fallacy, and illusion of control), a mediating variable (risk perception), two control variables (demographics and risk propensity), and the dependent variable (opportunity evaluation). We find that illusion of control and belief in the law of small numbers are related to how entrepreneurs evaluate opportunities. Our results also indicate that risk perception mediates opportunity evaluation.

Cognitive Biases, Risk Perception, and Individual's Decision to Start a New Venture

2018 ◽  
Vol 9 (3) ◽  
pp. 14-29 ◽  
Author(s):  
Salma Zaiane ◽  
Fatma Ben Moussa
Keyword(s):  
Risk Perception ◽  
Cognitive Biases ◽  
New Venture ◽  
Illusion Of Control ◽  
Mediating Role ◽  
Correlation And Regression Analysis ◽  
Reduce Risk ◽  
Relationship Of ◽  
The Relationship

The purpose of this article is to investigate the relationship of overconfidence and illusion of control towards the start of new venture, taking in consideration the mediating role of risk perception in the context of Tunisia. This article examines students' responses to surveys based on a teaching case titled “Optical Distortion, Inc.” The authors tested hypotheses by correlation and regression analysis. The results show that the perception towards risk associated with new venture plays an important role in decision-making. Moreover, they find that overconfidence and illusion of control reduce risk perception associated to the decision to start a venture. While overconfidence directly affects the decision to start a venture and indirectly through its effect on reducing the risk perception, illusion of control has neither a direct nor an indirect impact on that. These results partially confirm those of Simon show that the mediation exists but partially.

scholarly journals The Mediating Role of Risk Perception among Cognitive Biases towards Decision to Start a New Venture

2015 ◽  
Vol 54 ◽  
pp. 88-95
Author(s):  
Maheen Butt ◽  
Nadia Jamil ◽  
Rabia Nawaz
Keyword(s):  
Risk Perception ◽  
Risk Perceptions ◽  
Cognitive Biases ◽  
Negative Impact ◽  
New Venture ◽  
Illusion Of Control ◽  
Mediating Role ◽  
Overconfidence Bias ◽  
The Relationship

The Objective of the study is to investigate the relationship of overconfidence bias and illusion of control bias towards the start of new venture, with the mediating role of risk perception in context of Pakistan. To understand the relationship, this study developed and tested hypothesis by correlation and regression analysis. This study’s sample consisted of 170 students pursuing a Masters of Business Administration. The students’ responses to a survey based on a case study regarding a decision to start a venture were examined. This study found illusion of control and risk perceptions have significant effect on decision to start new venture. Conversely, overconfidence bias has insignificant relationship with decision to start new venture. The positive and negative impact of biases and perceiving low levels of risk suggest the importance of exploring the area of venture formation. As this study has incorporated two biases but many other biases should also be considered that effect human decision making process like self-efficacy, availability heuristics, law of small numbers and escalation of commitment.

scholarly journals Cognitive Biases, Risk Perception, and Risky Driving Behaviour

2021 ◽  
Vol 14 (1) ◽  
pp. 77
Author(s):  
Cornelia Măirean ◽  
Grigore M. Havârneanu ◽  
Danijela Barić ◽  
Corneliu Havârneanu
Keyword(s):  
Risk Perception ◽  
Traffic Safety ◽  
Cognitive Biases ◽  
Illusion Of Control ◽  
Future Research ◽  
Risky Behaviour ◽  
Risky Driving ◽  
Optimism Bias ◽  
Driving Behaviour ◽  
The Relationship

This study evaluated the relationship between drivers’ cognitive biases (i.e., optimism bias, illusion of control) and risky driving behaviour. It also investigated the mediational role of risk perception in the relationship between cognitive biases and self-reported risky driving. The sample included 366 drivers (Mage = 39.13, SD = 13.63 years) who completed scales measuring optimism bias, illusion of control, risk perception, and risky driving behaviour, as well as demographic information. The results showed that risky driving behaviour was negatively predicted by optimism bias and positively predicted by the illusion of control. Further, risk perception negatively correlated with risky behaviour and also mediated the relation between both optimism bias and illusion of control with risky driving. The practical implications of these results for traffic safety and future research are discussed.

scholarly journals The prognostic and diagnostic significance of the neutrophil-to-lymphocyte ratio in hepatocellular carcinoma: a prospective controlled study

2021 ◽  
Author(s):  
Philip J. Johnson ◽  
Sofi Dhanaraj ◽  
Sarah Berhane ◽  
Laura Bonnett ◽  
Yuk Ting Ma
Keyword(s):  
Hepatocellular Carcinoma ◽  
Regression Analysis ◽  
Prognostic Factor ◽  
Cox Regression ◽  
Prognostic Models ◽  
Controlled Study ◽  
Cox Regression Analysis ◽  
Neutrophil Lymphocyte Ratio ◽  
Lymphocyte Ratio ◽  
Significant Difference

Abstract Background The neutrophil–lymphocyte ratio (NLR), a presumed measure of the balance between neutrophil-associated pro-tumour inflammation and lymphocyte-dependent antitumour immune function, has been suggested as a prognostic factor for several cancers, including hepatocellular carcinoma (HCC). Methods In this study, a prospectively accrued cohort of 781 patients (493 HCC and 288 chronic liver disease (CLD) without HCC) were followed-up for more than 6 years. NLR levels between HCC and CLD patients were compared, and the effect of baseline NLR on overall survival amongst HCC patients was assessed via multivariable Cox regression analysis. Results On entry into the study (‘baseline’), there was no clinically significant difference in the NLR values between CLD and HCC patients. Amongst HCC patients, NLR levels closest to last visit/death were significantly higher compared to baseline. Multivariable Cox regression analysis showed that NLR was an independent prognostic factor, even after adjustment for the HCC stage. Conclusion NLR is a significant independent factor influencing survival in HCC patients, hence offering an additional dimension in prognostic models.

scholarly journals Comparison of intravenous sedation using midazolam during dental treatment in elderly patients with/without dementia: a prospective, controlled clinical trial

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Yuichi Tatsuno ◽  
Yoshinari Morimoto ◽  
Megumi Hayashi ◽  
Takatoshi Iida
Keyword(s):  
Regression Analysis ◽  
Cognitive Impairment ◽  
Elderly Patients ◽  
Multiple Regression Analysis ◽  
Multiple Regression ◽  
Intravenous Sedation ◽  
Negative Group ◽  
Severe Dementia ◽  
Positive Group ◽  
Significant Difference

AbstractThe effects of intravenous sedation with midazolam on the cerebral function of elderly patients with severe dementia are unclear. This study aimed to evaluate its effects on parameters such as brainwaves and cerebral blood flow (CBF) and compare them between elderly individuals with dementia and without cognitive impairment. Ten patients with severe dementia and 10 without cognitive impairment were registered. The bispectral index (BIS) and normalized tissue hemoglobin index (nTHI), which reflects CBF using near-infrared spectroscopy, were measured. Midazolam was administered until a Modified Observer’s Assessment of Alertness/Sedation score of 2 was reached. The chi-squared, Mann–Whitney U, Wilcoxon signed-rank, and Friedman tests and multiple regression analysis were used for comparisons. Whereas a similar decline in BIS values was observed in both groups after midazolam administration (P < 0.018), there was a significant decrease by 9% in the nTHI of the dementia-positive group (P < 0.013). However, there was no significant difference in the nTHI between the dementia-positive and dementia-negative group according to the multiple regression analysis (P = 0.058). In the dementia-negative group, none of the measured values differed from the baseline values. In the dementia-positive group, sedation with midazolam resulted in a 9% decrease in the CBF.

Donepezil Combined with DL-3-n-Butylphthalide Delays Cognitive Decline in Patients with Mild to Moderate Alzheimer’s Disease: A Multicenter, Prospective Cohort Study

2021 ◽  
Vol 80 (2) ◽  
pp. 673-681
Author(s):  
Jin Wang ◽  
Xiaojuan Guo ◽  
Wenhui Lu ◽  
Jie Liu ◽  
Hong Zhang ◽  
...  
Keyword(s):  
Alzheimer’S Disease ◽  
Alzheimer's Disease ◽  
Logistic Regression ◽  
Regression Analysis ◽  
Cohort Study ◽  
Prospective Cohort ◽  
Daily Living ◽  
Multivariate Logistic Regression Analysis ◽  
Multivariate Logistic Regression ◽  
Significant Difference

Background: Vascular factors and mitochondria dysfunction contribute to the pathogenesis of Alzheimer’s disease (AD). DL-3-n-butylphthalide (NBP) has an effect in protecting mitochondria and improving microcirculation. Objective: The aim was to investigate the effect of donepezil combined NBP therapy in patients with mild-moderate AD. Methods: It was a prospective cohort study. 92 mild-moderate AD patients were classified into the donepezil alone group (n = 43) or the donepezil combined NBP group (n = 49) for 48 weeks. All patients were evaluated with Alzheimer’s Disease Assessment Scale-Cognitive subscale (ADAS-cog), Clinician’s Interview-Based Impression of Change plus caregiver input (CIBIC-plus), Alzheimer’s Disease Cooperative Study-Activities of Daily Living (ADCS-ADL), and Neuropsychiatric Inventory (NPI) every 12 weeks. All patients were monitored for adverse events (AEs). The efficacy was analyzed using multivariate logistic regression analysis. Results: The multivariate logistic regression analysis showed that the changes of ADAS-cog score (OR = 2.778, 95% CI: [1.087, 7. 100], p = 0.033) and ADCS-ADL score (OR = 2.733, 95% CI: [1.002, 7.459], p = 0.049) had significant difference between donepezil alone group and donepezil combined NBP group, while the changes of NPI (OR = 1.145, 95% CI: [0.463, 2.829], p = 0.769), MMSE (OR = 1.563, 95% CI: [0.615, 3.971], p = 0.348) and CIBIC-plus (OR = 2.593, 95% CI: [0.696, 9.685], p = 0.156) had no significant difference. The occurrence of AEs was similar in the two groups. Conclusion: Over the 48-week treatment period, donepezil combined NBP group had slower cognitive decline and better activities of daily living in patients with mild to moderate AD. These indicated that the multi-target therapeutic effect of NBP may be a new choice for AD treatment.

scholarly journals Diabetes knowledge, risk perception, and quality of life among South Asian caregivers in young adulthood

2020 ◽  
Vol 8 (2) ◽  
pp. e001268
Author(s):  
Angela Koipuram ◽  
Sandra Carroll ◽  
Zubin Punthakee ◽  
Diana Sherifali
Keyword(s):  
Quality Of Life ◽  
Risk Perception ◽  
South Asian ◽  
Online Survey ◽  
Educational Interventions ◽  
Cross Sectional Study ◽  
Cross Sectional ◽  
Significant Difference ◽  
Design And Methods

IntroductionPersons of South Asian descent have a higher prevalence of type 2 diabetes mellitus (T2DM). The management of T2DM in the South Asian community has required the support of adult children, potentially impacting the quality of life, diabetes-related knowledge, and risk perception among these caregivers.Research design and methodsTo investigate diabetes-related knowledge, quality of life, risk perception, and actual risk of developing diabetes among South Asian young adults whose parents are living with T2DM. A cross-sectional study was conducted (n=150). An online survey was administered. Data were analyzed with descriptive and inferential statistics.ResultsThere was a statistically significant difference in diabetes-related knowledge between males and females (p<0.001). Males (in comparison to females) had a lower risk perception of developing diabetes (p=0.06). Further, risk perception and diabetes-related knowledge were positively associated with caregiver’s physical health (p=0.002).ConclusionFindings highlight the importance of providing gender-specific and culturally tailored diabetes educational interventions.

Müller-Weiss Disease: The Descriptive Factors of Failure Conservative Treatment

2021 ◽  
pp. 107110072110028
Author(s):  
Thos Harnroongroj ◽  
Theerawoot Tharmviboonsri ◽  
Bavornrit Chuckpaiwong
Keyword(s):  
Regression Analysis ◽  
Conservative Treatment ◽  
Demographic Characteristics ◽  
Classification Systems ◽  
Clinical Severity ◽  
P Value ◽  
Level Of Evidence ◽  
Factors Associated ◽  
Radiographic Parameters ◽  
Significant Difference

Background: Conservative treatment is the first-line approach for Müller-Weiss disease (MWD). However, factors associated with the failure of conservative treatment have never been reported. Our objectives were to compare the differences in demographic and radiographic parameters between “successful” and “failure” conservative treatment in patients with MWD and identify descriptive factors associated with failure conservative treatment. Methods: We retrospectively reviewed 68 patients with MWD divided into 29 “failure” and 39 “successful” conservative treatment groups. Demographic characteristics, Foot and Ankle Outcome Score (FAOS), visual analog scale (VAS) scores for pain and walking disability, and radiographic parameters such as calcaneal pitch, lateral Meary, anteroposterior (AP) Meary angle, and talonavicular-naviculocuneiform arthritis were compared. Logistic regression analysis was performed to identify descriptive factors of failure conservative treatment. A P value <.05 was considered a statistically significant difference. Results: We found more severe VAS pain and walking disability scores and FAOS for the pain, activities of daily living, and quality of life subscales in the failure group ( P < .05). Regression analysis demonstrated 2 significant descriptive factors associated with failure conservative treatment: abducted AP Meary angle >13.0 degrees and radiographic talonavicular arthritis. No demographic characteristics were found to be associated with failure conservative treatment. Conclusion: Midfoot abduction (AP Meary angle, >13 degrees) and radiographic talonavicular arthritis were factors associated with failure conservative treatment in MWD and should be determined concurrently with the clinical severity. Classification systems for MWD should include these factors. Level of evidence: Level III, retrospective comparative study.

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