Monday, 9 January 2017

The most depressing day of the year does not exist

It's that time of year again. In early January, several reports will appear in the press (e.g. The Sun) suggesting that the third Monday of January has been identified as the most depressing day of the year.

This is false.

Previous Weekday Research

It is true that some days of the week evoke strong emotional responses. In fact, a small body of research has identified regularities between weekday and behaviour, and also between weekday and mood. Across studies on these topics, two main patterns are emphasised. One is the so-called Blue Monday effect. In a wide range of situations and measures, outcomes are especially negative on Mondays. Many of these situations are non-trivial, as they pertain to health and economic matters. For example, heart attack risk is higher, suicide rate is higher, reported mood is lower, and stock returns are lower. Even emails sent on a Monday also contain more grammatical mistakes and are less positive.

Especially positive outcomes on Fridays have also been reported, but with less consistency. This pattern suggests that, at least in terms of mood, Mondays (and possibly Fridays) may be qualitatively different from the other days of the week, which are themselves relatively undifferentiated.




A second pattern emphasises gradual change from negative to positive through the week. For example, we observed that medical appointments on Mondays were much more likely to be missed than appointments on Fridays. Critically, the rate of missed appointments declined monotonically over the intervening days. This pattern suggests that, rather than being qualitatively different, Monday and Friday may be two extremes along a continuum of change.

Poor Journalism

Unfortunately, this research is constantly at loggerheads with the idea that there is a universal worst day of the year. This can in fact be traced back to a press release from a travel company in 2005. There is, in start contrast to weekday research, very little evidence to suggest that seasonal changes in mood exist - a key exception being those who suffer from Seasonal Affective Disorder (SAD).

Regarding weekday effects specifically, the big challenge for future research is to try and understand and unpick what might be driving these effects.

In an ideal world, I would rather that these issues were not continually overshadowed by the lazy reporting of a phenomena that has long since been publicly debunked.

Thursday, 24 November 2016

Media coverage from recent paper: Predicting Smartphone Operating System from Personality and Individual Differences

Shaw Heather, Ellis David A., Kendrick Libby-Rae, Ziegler Fenja, and Wiseman Richard. Cyberpsychology, Behavior, and Social Networking. December 2016, 19(12): 727-732. doi: 10.1089/cyber.2016.0324.
I am no longer going try and compile complete lists for media coverage, but this work has appeared in The Daily Mail (UK), The Mirror (UK), The Metro (UK), Slate (France), ESS (Finland), MK (Korea), Aftenposten (Norway), The New York Post (USA), The Inquirer (USA), CNET (USA), and Vogue (USA).

Monday, 3 October 2016

Wearable manufacturers are still not letting customers view their raw data

I've worn a Garmin wearable fitness tracker religiously for the last 9 months. The device has now become unreliable, but with so much data collected, I was curious to quantify patterns based on physical activity and sleep (this model measures both).

However, while I can view a daily step count using the online service Garmin Connect, I also wanted to download my total step count for each day and run my own separate analysis.

But this isn't possible (see below).





I own the device, but not the data. Garmin can provide access to an API, but this remains expensive according to this reddit feed. It would actually be cheaper to build my own device and use that instead.

Personally, I don't see how preventing customers from accessing their own raw data can continue. I understand why a manufacture would restrict access to the exact algorithm that takes accelerometer data and converts this data into steps, but my request outlined above is entirely reasonable. Manufacturers could even run competitions where people are encouraged to develop new predictive analytics/insights from this data, which could be integrated into new products and services.

The attitude of consumer wearable manufacturers here is totally at odds with other areas of the tech industry. For example, both Facebook and Twitter provide access to user generated data on request. However, as colleagues and I discussed earlier this year, manufacturers are remain uninterested or unwilling to allow users access to their own data from wearable devices.

Wednesday, 3 August 2016

Rosenberg self-esteem scale: SPSS Script

The Rosenberg self-esteem scale is a psychological inventory based on a 4-point likert scale and consists of 10 questions. It is used extensively to measure self-esteem across the social sciences.

Below is a short script for SPSS which will help speed up the coding process. 

All items should be labeled as separate numeric variables as R1, R2...etc


The script computes and prints the results for all reverse scored items and then calculates the total score


*Part 1 - reverse scoring of specific items


COMPUTE R3 = 5 - Q3.
EXECUTE.
COMPUTE R5 = 5 - Q5.
EXECUTE.
COMPUTE R8 = 5 - Q8.
EXECUTE.
COMPUTE R9 = 5 - Q9.
EXECUTE.
COMPUTE R10 = 5 - Q10.
EXECUTE.


*Part 2 - total score

COMPUTE Rosenberg = Q1+Q2+R3+Q4+R5+Q6+Q7+R8+R9+R10.
EXECUTE.


*Reliability 

RELIABILITY
  /VARIABLES=Q1 Q2 R3 Q4 R5 Q6 Q7 R8 R9 R10
  /SCALE('ALL VARIABLES') ALL
  /MODEL=ALPHA.


Friday, 22 July 2016

Open science reading list

Science has its problems, but many early career researchers (myself included) can often struggle when it comes to knowing how we can improve systems that we still very much have to operate within on a daily basis.

That said, I am a firm believer that making research readily available to others is something that we should all work towards where possible. This applies to publications, data, computer code/software and the peer review process.


The references below are taken from my own reading, but this list certainly isn't exhaustive.

All of these papers pull in the same direction. Specifically, they provide convincing evidence that open access research practices help science as well as the individual researcher.

Early career researchers, who are typically gifted very little time to get ideas off the ground and demonstrate that they have societal importance, will help their own cause by ensuring that work is readily available across multiple disciplines and beyond.

Moving forward, the next major issue for open access is no  longer whether it should be at the centre of the mainstream scholarly communication system, but how it will work effectively. 

Antelman, K. (2004). Do open-access articles have a greater research impact?. College & research libraries65(5), 372-382.


Davis, P. M. (2011). Open access, readership, citations: a randomized controlled trial of scientific journal publishing. The FASEB Journal25(7), 2129-2134.

Donovan, J. M., Watson, C. A., & Osborne, C. (2014). The open access advantage for American law reviews. Edison: Law+ Technology (JPTOS's Open Access Journal), Forthcoming.



Harnad, S., & Brody, T. (2004). Comparing the impact of open access (OA) vs. non-OA articles in the same journals. D-lib Magazine10(6).

Kousha, K., & Abdoli, M. (2010). The citation impact of Open Access agricultural research: A comparison between OA and non-OA publications.Online Information Review34(5), 772-785.

Lawrence, P. A. (2008). Lost in publication: how measurement harms science. Ethics in science and environmental politics8(1), 9-11.


PLoS Medicine Editors. (2006). The impact factor game. PLoS Med3(6), e291.

Piwowar, H. A., & Vision, T. J. (2013). Data reuse and the open data citation advantage. PeerJ1, e175.

Sandve, G. K., Nekrutenko, A., Taylor, J., & Hovig, E. (2013). Ten simple rules for reproducible computational research. PLoS Comput Biol9(10), e1003285.

Siebert, S., Machesky, L. M., & Insall, R. H. (2015). Overflow in science and its implications for trust. Elife4, e10825.

Walsh, E., Rooney, M., Appleby, L., & Wilkinson, G. (2000). Open peer review: a randomised controlled trial. The British Journal of Psychiatry,176(1), 47-51. 

Wang, X., Liu, C., Mao, W., & Fang, Z. (2015). The open access advantage considering citation, article usage and social media attention. scientometrics,103(2), 555-564.

Wicherts, J. M. (2016). Peer review quality and transparency of the peer-review process in open access and subscription journals. PloS one11(1), e0147913.




Tuesday, 5 July 2016

The effect of exam anxiety on time perception


The brief study reported below appeared in an earlier draft of my PhD, but wasn't included in the final version. The sample is small, but the results are interesting enough to merit a blog entry. If nothing else the method certainly hints towards the abundant use of smartphones in future work!


Introduction

States of mind characterised by disturbed time perception (e.g. schizophrenia [Davalos et al. 2003] and some hallucinogenic states [Wittman et al. 2007]) can severely disrupt normal functioning. However, even in normal mental states, time perception is surprisingly labile. For example, during threatening events such as car accidents and robberies, many people report that events seem to pass in slow motion - as if time has slowed down. Emotions in a more general sense are also known to influence and sometimes distort time perception. Droit-Volet and Meck (2007) for example, observed that the exposure of emotional faces were overestimated compared to neutral ones.

The attentional gate model might explain why people are relatively inaccurate in making timing judgements during emotional experiences (Figure 1). In some cases, emotions demand attentional resources for coping with those events and duration estimates will be underestimated. In other cases, especially when emotions have a threatening quality, the duration will be overestimated. However, researchers have often struggled to examine this within a typical population because simulating a state of anxiety is both difficult and not ethically palatable. In this experiment, we bypassed this issue this by conducting a short experimental task outside an exam hall, where people are naturally anxious (Arana and Furlan 2016). We therefore predicted that anxiety directly before an exam would positively correlate with estimates that underestimate actual duration.


Figure 1. A pacemaker produces a series of pulses that are fed into an accumulator. The number of pulses that has been recorded for a given time span represents experienced duration. The pulse number is compared with stored representations of time periods that can be verbalized (as seconds or minutes). Attentional gate models  assume that only when attention is directed to time pulses are accumulated. 


Method

Written consent was obtained from participants in advance of their exam, but all participants remained naive to the purpose of the study until they met with the experimenter outside the exam hall. Prior to entering an undergraduate exam hall at The University of Glasgow, participants were required to use an iPhone App (Figure 2) and adjust the rate of flashing to what they best perceived to be a rate of one flash per second (1Hz). They were also asked to give brief measures of anxiety and relief on a simple 1 to 10 scale. This procedure was repeated after they left the exam. Their exam performance was also recorded.




Figure 2. Screenshot from an iPhone app that allowed participants to adjust the rate of flashing to best match a rate of 1Hz.

Participants
13 first year psychology students studying at the University of Glasgow agreed to take part. They received one course credit in return for their participation.


Results

Manipulation check
A paired sample t-test [t(11) = -3.05, = .011] revealed that self-reported anxiety scores were significantly higher before (= 5.67 SD = 2.10) than after the exam (M  = 2.83 SD = 2.29).  No significant changes were observed between time estimates before (M = 67.08 SD = 27.76) or after (M = 62.67 SD = 11.56) the exam [t(11) = -.521, p = .612]

Figure 3. Scatter plot illustrating a positive relationship between self-reported anxiety and adjusted rate of flashing. Red line indicates the correct response (1Hz).

A positive correlation (Figure 3) was observed between self-reported levels of anxiety and participants adjusted rate of flashing [r(11) = .82, p < .01].  A second correlation coefficients showed no significant relationship between anxiety or rate of adjusted flashing post-exam [r = -.15, ns].


Discussion 

In the first instance, this experiment appears to support previous research that increased levels of anxiety show a strong correlation with underestimating duration. In other words, time appeared to speed up, but only for participants who rated their anxiety above 5 (out of 10). The reverse was true for those who felt relatively relaxed. As expected, higher levels of anxiety associated with a forthcoming exam appear to require attentional resources and the duration of flashes was therefore underestimated (Droit-Volet and Gil 2009). What remains unclear however, is whether participants estimates were guided by the flashes themselves or the gap between each flash. This effect could be partly driven by people who are more anxious in general, but this seems unlikely given that the effect disappeared post-exam where participants were no longer anxious. However, it is not possible to rule out practice effects completely. 

Cognitive-processing mechanisms appear to guide our experience of duration. While the perception of time is strongly linked to our subjective-well being, it also varies considerably depending on specific emotional states (Wittmann and Paulus 2007). The feeling that time passes quickly or slowly can be a fair indicator of both psychological distress resulting from an inability to focus meaningful thoughts, but it may also help focus our attention on important activities in other contexts that require considerable cognitive resources. 

References

Arana, F. G. and Furlan, L. (2016). Groups of perfectionists, test anxiety, and pre-exam coping in Argentine students. Personality and Individual Differences90, 169-173.

Davalos, D. B., Kisley, M. A. and Ross, R. G. (2003). Effects of interval duration on 
temporal processing in schizophrenia. Brain and Cognition. 52, 295–301.

Droit-Volet, S. and Meck, W. H. (2007). How emotions colour our perception of time. Trends in Cognitive Sciences11(12), 504-513.


Droit-Volet, S. and Gil, S. (2009). The time-emotion paradox. Philos Trans R Soc Lond B Bio Sci. 364, 1943-1953.

Loewenstein, G. F. (1996). "Out of control: Visceral influences on behavior. Organizational Behavior and Human Decision Processes. 65(2), 272-292.

Wittmann, M. and Paulus, M. P. (2007). Decision making, impulsivity and time perception. Trends in Cognitive Sciences. 12(1), 7-12.

Tuesday, 24 May 2016

ESRC PhD Studentship: Enhancing our Understanding of Digital Traces


POSITION FILLED

This is now advertised on jobs.ac.uk, but if you wish to discuss the studentship informally or if you have any questions about the position, please contact me (d.a.ellis@lancaster.ac.uk).