Table 2.
Proportion of participants’ portion size estimations using the image-series per presented food item in percent classified as correct or adjacent, adjacent, lightly misclassified or grossly misclassified in the image-series validation study, the Norwegian version of myfood24
| Food item | Correct or adjacent (%) | Adjacent (%) | Lightly misclassified (%) | Grossly misclassified (%) |
|---|---|---|---|---|
| Beans | 95 | 27 | 5 | 0 |
| Beansa | 100 | 5 | 0 | 0 |
| Blueberries | 98 | 64 | 0 | 2 |
| Blueberriesb | 100 | 78 | 0 | 0 |
| Brownie | 95 | 34 | 2 | 2 |
| Browniea | 98 | 37 | 0 | 2 |
| Butter (spread) | 88 | 64 | 12 | 0 |
| Butter (spread)a | 81 | 44 | 19 | 0 |
| Candy (without chocolate) | 98 | 69 | 2 | 0 |
| Candy (without chocolate)a | 100 | 10 | 0 | 0 |
| Candy with chocolate | 98 | 13 | 2 | 0 |
| Candy with chocolatea | 98 | 37 | 0 | 2 |
| Carrot cake | 100 | 15 | 0 | 0 |
| Carrot cakea | 100 | 15 | 0 | 0 |
| Caviar (spread) | 88 | 56 | 12 | 0 |
| Caviar (spread)a | 51 | 27 | 47 | 2 |
| Chicken | 100 | 22 | 0 | 0 |
| Chickena | 100 | 20 | 0 | 0 |
| Jam | 100 | 71 | 0 | 0 |
| Jamb | 76 | 42 | 24 | 0 |
| Liver pâté | 88 | 29 | 7 | 5 |
| Liver pâtéa | 100 | 76 | 0 | 0 |
| Marzipan cake | 68 | 58 | 32 | 0 |
| Marzipan cakeb | 90 | 29 | 10 | 0 |
| Meat | 90 | 44 | 7 | 3 |
| Meatb | 100 | 5 | 0 | 0 |
| Mexican stew | 98 | 49 | 2 | 0 |
| Mexican stewb | 100 | 29 | 0 | 0 |
| Mexican stew with beans | 93 | 76 | 7 | 0 |
| Mexican stew with beansb | 90 | 83 | 10 | 0 |
| Mexican stew with meat | 98 | 35 | 2 | 0 |
| Mexican stew with meata | 98 | 13 | 2 | 0 |
| Muesli | 100 | 37 | 0 | 0 |
| Mueslia | 98 | 83 | 0 | 2 |
| Peanuts | 100 | 15 | 0 | 0 |
| Peanutsa | 95 | 41 | 5 | 0 |
| Potato chips | 100 | 37 | 0 | 0 |
| Potato chipsb | 100 | 22 | 0 | 0 |
| Raspberries | 100 | 7 | 0 | 0 |
| Raspberriesb | 98 | 37 | 0 | 2 |
| Slice of bread | 44 | 29 | 56 | 0 |
| Slice of breada | 98 | 35 | 2 | 0 |
| Stew (potato based) | 95 | 49 | 5 | 0 |
| Stew (potato based)a | 93 | 66 | 7 | 0 |
| Strawberries | 100 | 12 | 0 | 0 |
| Strawberriesb | 98 | 5 | 2 | 0 |
Correct or adjacent defined as a perfect or partially match, in that participants chose the matching or the closest portion size image corresponding to the portion size of the same food or dish presented to them. Adjacent defined as a partially match, in that participants chose the closest portion size image corresponding to the presented portion size. Lightly misclassified defined as a partially mismatch, in that participants chose an image of a portion size situated 2–3 images distant from the correct portion size image for the presented serving of food. Grossly misclassified defined as a complete mismatch, that is when participants chose a portion size image 4 or more images distant from the image corresponding to the presented portion size.
Presented portion weight increased by 25 % of the differential to the adjacent portion size image.
Presented portion weight decreased by 25 % of the differential to the adjacent portion size image.