Alexandra M Johnstone
Biographic Data
| ID | 4423008 |
|---|---|
| NAME | Alexandra M Johnstone |
| GIVEN NAMES | Alexandra M |
| FAMILY NAME | Johnstone |
| SIGNATURE | JOHNSTONE A M |
| AFFILIATIONS | University of Aberdeen |
| ORCID | 0000-0002-5484-292X |
| VERIFIED | Yes |
| TOTAL WORKS | 15 |
| TOTAL CITATIONS | 21 |
| AUTHOR COUNT | 15 |
| EDITOR COUNT | 0 |
| FIRST PUBLICATION YEAR | 2000 |
| LATEST PUBLICATION YEAR | 2026 |
| H-INDEX | 3 |
The length of a piece of string
Determination of the magnitude or size of objects is crucial in many activities of daily living. Here we provide psychophysical evidence across multiple experiments that judgements for accumulated length of fragmented lines are non-veridical, with a larger number of fragments leading to a larger reduction in perceived size. The reported reduction in the size of fragmented stimuli is not a result of stimulus bias or frequency of observations and r…
“It was a force for good but…”
Stakeholders viewed the legislation as a force for good but highlighted challenges in implementation and enforcement. • Stakeholders reported limited government communication, delayed guidance, and access to product nutrition data as key implementation challenges. • Seven policy recommendations were co-developed to support the development and implementation of effective food policy in future. In 2022, legislation in England restricted products hi…
“We go hunting …”
The high prevalence of food insecurity in the United Kingdom has been exacerbated by the cost-of-living crisis. In high-income countries, those experiencing food insecurity struggle to buy and consume foods that meet Government healthy eating recommendations, and are at increased risk of obesity, linked to poor diet quality. Individuals in high-income countries purchase most of their food to consume at home from supermarkets, making this an impor…
Participants or pretenders? Addressing the challenge of inauthentic participation encountered during three social research studies on experiences of food insecurity in the UK
Individuals participate in research for numerous reasons, however, the global economic downturn may have driven some to participate solely for monetary recompense. While inauthentic participation is more widely recognised in quantitative survey studies, it is increasingly becoming an issue in qualitative research. Drawing on our experiences and supported by the wider literature, we highlight ways in which inauthentic participation can be identifi…
Food insecurity, obesity and the cost-of-living crisis
Customer awareness and perceptions of the high in fat, sugar, and salt (HFSS) placement legislation and impacts on self-reported food purchasing
Understanding the barriers to purchasing healthier, more environmentally sustainable food for people living with obesity and varying experiences of food insecurity in the UK
The impact of the cost of living crisis and food insecurity on food purchasing behaviours and food preparation practices in people living with obesity
Lower income households are at greater risk of food insecurity and poor diet quality than higher income households. In high-income countries, food insecurity is associated with high levels of obesity, and in the UK specifically, the cost of living crisis (i.e., where the cost of everyday essentials has increased quicker than wages) is likely to have exacerbated existing dietary inequalities. There is currently a lack of understanding of the impac…
Nudging, formulating new products, and the lifecourse
Predicting the selection of protein-containing foods in older adults
Dietary supplementation with a type 3 resistant starch induces butyrate producing bacteria within the gut microbiota of human volunteers
Resistant starch type 3. Effect on body weight, body composition and appetite
Sustainable diets for the future
Evaluating energy intake measurement in free-living subjects
Objective To nutritionally analyse mean energy intake (EI) from different 3 d intervals within a 7 d recording period and to evaluate the seasonal effect on energy and nutrient intake. Design Cross-sectional study of dietary intake collected with 7 d food diaries. Setting Aberdeen, north-east Scotland, UK, between 2002 and 2004. Subjects Participants from two long-term trials were pooled. These trials, investigating genetic and environmental infl…
The use of visual analogue scales to assess motivation to eat in human subjects
This present paper reviews the reliability and validity of visual analogue scales (VAS) in terms of (1) their ability to predict feeding behaviour, (2) their sensitivity to experimental manipulations, and (3) their reproducibility. VAS correlate with, but do not reliably predict, energy intake to the extent that they could be used as a proxy of energy intake. They do predict meal initiation in subjects eating their normal diets in their normal en…
Nudging, formulating new products, and the lifecourse
The impact of the cost of living crisis and food insecurity on food purchasing behaviours and food preparation practices in people living with obesity
Lower income households are at greater risk of food insecurity and poor diet quality than higher income households. In high-income countries, food insecurity is associated with high levels of obesity, and in the UK specifically, the cost of living crisis (i.e., where the cost of everyday essentials has increased quicker than wages) is likely to have exacerbated existing dietary inequalities. There is currently a lack of understanding of the impac…
Understanding the barriers to purchasing healthier, more environmentally sustainable food for people living with obesity and varying experiences of food insecurity in the UK
Customer awareness and perceptions of the high in fat, sugar, and salt (HFSS) placement legislation and impacts on self-reported food purchasing
The use of visual analogue scales to assess motivation to eat in human subjects
This present paper reviews the reliability and validity of visual analogue scales (VAS) in terms of (1) their ability to predict feeding behaviour, (2) their sensitivity to experimental manipulations, and (3) their reproducibility. VAS correlate with, but do not reliably predict, energy intake to the extent that they could be used as a proxy of energy intake. They do predict meal initiation in subjects eating their normal diets in their normal en…
Evaluating energy intake measurement in free-living subjects
Objective To nutritionally analyse mean energy intake (EI) from different 3 d intervals within a 7 d recording period and to evaluate the seasonal effect on energy and nutrient intake. Design Cross-sectional study of dietary intake collected with 7 d food diaries. Setting Aberdeen, north-east Scotland, UK, between 2002 and 2004. Subjects Participants from two long-term trials were pooled. These trials, investigating genetic and environmental infl…
Sustainable diets for the future
Dietary supplementation with a type 3 resistant starch induces butyrate producing bacteria within the gut microbiota of human volunteers
Resistant starch type 3. Effect on body weight, body composition and appetite
Predicting the selection of protein-containing foods in older adults
Nudging, formulating new products, and the lifecourse
The impact of the cost of living crisis and food insecurity on food purchasing behaviours and food preparation practices in people living with obesity
Lower income households are at greater risk of food insecurity and poor diet quality than higher income households. In high-income countries, food insecurity is associated with high levels of obesity, and in the UK specifically, the cost of living crisis (i.e., where the cost of everyday essentials has increased quicker than wages) is likely to have exacerbated existing dietary inequalities. There is currently a lack of understanding of the impac…
“We go hunting …”
The high prevalence of food insecurity in the United Kingdom has been exacerbated by the cost-of-living crisis. In high-income countries, those experiencing food insecurity struggle to buy and consume foods that meet Government healthy eating recommendations, and are at increased risk of obesity, linked to poor diet quality. Individuals in high-income countries purchase most of their food to consume at home from supermarkets, making this an impor…
Participants or pretenders? Addressing the challenge of inauthentic participation encountered during three social research studies on experiences of food insecurity in the UK
Individuals participate in research for numerous reasons, however, the global economic downturn may have driven some to participate solely for monetary recompense. While inauthentic participation is more widely recognised in quantitative survey studies, it is increasingly becoming an issue in qualitative research. Drawing on our experiences and supported by the wider literature, we highlight ways in which inauthentic participation can be identifi…
Food insecurity, obesity and the cost-of-living crisis
Customer awareness and perceptions of the high in fat, sugar, and salt (HFSS) placement legislation and impacts on self-reported food purchasing
Understanding the barriers to purchasing healthier, more environmentally sustainable food for people living with obesity and varying experiences of food insecurity in the UK
The length of a piece of string
Determination of the magnitude or size of objects is crucial in many activities of daily living. Here we provide psychophysical evidence across multiple experiments that judgements for accumulated length of fragmented lines are non-veridical, with a larger number of fragments leading to a larger reduction in perceived size. The reported reduction in the size of fragmented stimuli is not a result of stimulus bias or frequency of observations and r…
“It was a force for good but…”
Stakeholders viewed the legislation as a force for good but highlighted challenges in implementation and enforcement. • Stakeholders reported limited government communication, delayed guidance, and access to product nutrition data as key implementation challenges. • Seven policy recommendations were co-developed to support the development and implementation of effective food policy in future. In 2022, legislation in England restricted products hi…
Medicine (9 works) · Business (6 works) · Environmental health (6 works) · Obesity, Physical Activity, Diet (6 works) · Consumer Attitudes and Food Labeling (4 works) · Food insecurity (4 works) · Food Science (4 works) · Food Security and Health in Diverse Populations (4 works) · Marketing (4 works) · Nutritional Studies and Diet (4 works)