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- Ljung Aust, Mikael, 1973
(författare)
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Developing Theoretical and Empirical Definitions of Safety Problems in Driving Suitable for Active Safety Function Evaluation
- 2009
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Licentiatavhandling (övrigt vetenskapligt/konstnärligt)abstract
- In passive safety, the requirement specifications used for evaluation of protective functions are both standardised and specified at a high level of detail regarding evaluation scenario definition, performance metrics and pass/fail criteria. For active safety, while several propositions for evaluation scenarios have been made, neither these, nor performance metrics and pass/fail criteria have yet reached a similar level of detail and standardisation. The objective of this thesis is to address two underlying reasons for this difference. One is theoretical in nature. On a general level, a set of principles and concepts which capture the fundamental ideas of a field of science can be called a conceptual framework. For active safety function evaluation, such a framework is currently lacking. To address this issue, a conceptual framework called Situational control was developed. The framework integrates fundamental ideas relevant for active safety function evaluation into a holistic and practically applicable picture. Its applicability was demonstrated by applying it in the context of writing and implementing requirement specifications for active safety function evaluation.The second reason is of empirical character. To evaluate the extent to which active safety functions prevent and/or mitigate crashes, it is essential to characterize the sequence of events which leads to collisions in a way which includes information on causal factors. To do this, data from official databases (macroscopic data), and in-depth case studies is often used. Macroscopic data is usually statistically representative but has limited information on why crashes happen, while the opposite is true of case studies. Using the two in combination would therefore seem ideal. However, the principles for connecting them are far from clear and current approaches suffer inherent weaknesses. To address this issue, a generalization methodology which links information in case studies to macroscopic crash types, in a way which covers not only context but also causation similarity, was developed. The feasibility of the methodology was tested through application on three sets of intersection crash data. Results indicate that the methodology was sufficiently successful to warrant further exploration with larger data sets.
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- Martins Silva Ramos, Érika, 1991, et al.
(författare)
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An empirical investigation of attitudes towards daily commuting transportation: the impacts of travel satisfaction, driving habits and social desirability.
- 2018
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Ingår i: The 29th International Congress of Applied Psychology, June 26-30, Montréal, Canada.
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- Background/Rational Every day people decide how to travel to their out-of-home activities. What is important for them when choosing the mode of transportation? Are those things predictors of attitudes towards modes of transportation along with driving habits and satisfaction with daily travel? Does being more or less satisfied affect people’s attitudes? Method A survey was mailed to a sample of 3,000 Swedish residents in rural, semi-rural and urban areas. The questionnaire consisted of four sections: driving habits, satisfaction, important aspects when choosing mode of daily commuting and socio-demographics measurements. Results Factor analysis was conducted regarding “satisfaction with daily commuting”, “important aspects for mode choice of commuting” and “driving habits” (KMO = .74; .76; 79, respectively). The retained factors were used in multiple regressions analyses as predictors of attitudes towards car, public transport and bike (R2 = .32; .11; .16, respectively). Conclusions “Driving habits” was the main predictor for attitudes towards car while “socially desirable aspects” was the most important factor to predict attitudes towards public transport and bike. Living in big cities negatively affected attitudes toward car and satisfaction with daily commuting was a minor predictor for all modes of transportation. Action/Impact Attitudes towards modes of commuting are predicted by people’s habits and what they value as important when commuting. Knowing what they value when choosing modes of transportation gives support to implement accurate and effective interventions, policies and new services that promote sustainability in transportation.
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- Ask, Karl, 1978, et al.
(författare)
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The effects of approach and avoidance states on lie-detection accuracy
- 2017
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Ingår i: 18th General Meeting of the European Association of Social Psychology, Granada, Spain, 5-8 July, 2017.
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- Three experiments examined perceivers’ lie-detection performance under different self-regulatory states. Overall, participants in approach and avoidance states did not differ in their ability to discriminate between truthful and deceptive messages, but approach participants displayed impaired performance relative to controls.
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- Hagsand, Angelica, 1985, et al.
(författare)
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Alcohol, crime and memory. Intoxicated eyewitnesses delayed recall of a kidnapping.
- 2012
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Ingår i: Svenska föreningen för Alkohol- och Drogforskning, konferens 8-9 November, Norrköping.
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- Alcohol is involved in 50-70% of violent crimes in Sweden. Eyewitness memory is a valuable source in investigations and it is common that the police interview alcohol intoxicated eyewitnesses. There are few studies on how alcohol affects witness memory. This study investigated how different doses of alcohol affected eyewitness recall one week after witnessing a crime and potential sex differences. The participants (N = 126) were healthy adults and were randomly assigned to either a control group, 0.0 g/kg ethanol (N = 42), a lower alcohol dose group, 0.4 g/kg ethanol (N = 40), or a higher alcohol dose group, 0.7 g/kg ethanol (N = 44). After 15 minutes consumption in a laboratory, participants witnessed a film showing a kidnapping of a woman by two men. The witnesses were interviewed about the crime one week later in a sober state. Witnesses in the higher alcohol dose group recalled fewer details compared to witnesses in the lower alcohol dose group. The amount of alcohol consumed did not have an impact on accuracy. Women and men reached the same blood alcohol concentration and no sex differences were found in recall. Interestingly, although the witnesses in the high alcohol dose group reported less information, their testimony was as correct as the testimony given by witnesses in the control group and the lower alcohol dose group. Despite the interesting results, more studies are needed before recommendations to the legal system can be made.
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- Hagsand, Angelica, 1985, et al.
(författare)
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Alcohol intoxicated eyewitnesses´ delayed recall of a kidnapping.
- 2013
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Ingår i: Poster presented at the European Association of Psychology and Law, 5th of September 2013, Coventry, UK..
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- This study investigated how different doses of alcohol affected eyewitness recall. Participants (N = 126) were randomly assigned to three groups with different blood alcohol concentration (BAC), either a control group (mean BAC 0.00%, N = 42), a lower alcohol dose group (mean BAC 0.04%, N = 40), or a higher alcohol dose group (mean BAC 0.06%, N = 44). After consumption in a laboratory, participants witnessed a film of a mock crime where a woman was kidnapped by two men. One week after, the witnesses were interviewed in a sober state, by interviewers who were blind to which beverage the witnesses had consumed the week before. The main results showed that witnesses with the higher intoxication level recalled fewer details compared to witnesses with the lower intoxication level. The amount of alcohol consumed did not have an impact on the accuracy rate. No sex differences were found. We conclude that more studies are needed before recommendations can be made to an applied setting, but this study showed that alcohol may have a negative impact on eyewitness recall.
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- Hagsand, Angelica, 1985, et al.
(författare)
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Effect of the degree of alcohol intoxication on eyewitness memory for a violent crime: Identification accuracy in lineup
- 2011
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Ingår i: Oral presentation at The Nordic Network for Psychology and Law (NNPL), September 16-17 2011, Oslo, Norway.
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- Introduction and Aim. In Sweden, 50-70% of all violent crimes are alcohol related (BRÅ, 2007, 2009). Eyewitnesses are valuable to the Police since they have seen the event and many crimes lack technical evidence like DNA. Due to the limited studies in the area, this ongoing experimental study might give valuable knowledge to the legal system concerning the assessment of alcohol intoxicated eyewitnesses and the credibility of their testimonies. Methods. The participants (N = 120 when finished) consists of healthy adult students. The study uses a 3 x 2 between- participants design with random assignment to alcohol beverage (none vs. moderate vs. high dose,) and lineup presentation (target present vs. target absent). Consumption time is 15 minutes in a laboratory with living room design. A movie depicting a staged kidnapping is shown to the participants and after 30 minutes of distracting filler tasks the participants are interviewed. One week later, the participants are presented the simultaneous lineup in order to identify the culprit from the movie and are also interviewed in more detail about the crime scene. Results and Conclusions. The data collection is ongoing during the spring of 2011. To this date, data from half of the participants has been collected. Results concerning identification accuracy will be presented and discussed at the NNPL conference in Oslo in September 2011.
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