Focus of attention and the archer's brain: Qin 2025

Sixteen Chinese archers aged sixteen shot at 70 metres with an fNIRS cap on their heads, first concentrating on the sight pin inside the gold and then on the sensations in their arms, to see whether scores and brain activity change with what attention is directed at. The scores did not change: t of 0.53, p = 0.61, with an effect size of 0.12, which is as good as nothing.

Brain activity did change, in five channels out of forty-eight. With external focus, meaning the sight, oxyhaemoglobin rose in the visual areas V2 and V3 (4.36 against 1.28 and 4.81 against 2.32, in units of 10 to the minus five millimoles per litre) and fell in three motor and somatosensory channels: the left premotor and supplementary motor cortex (3.05 against 4.66), the left primary somatosensory cortex (2.01 against 3.32) and the right primary motor cortex (1.43 against 3.18). The effect sizes run from 0.60 to 1.01.

In a sixth channel, also over the left premotor and supplementary motor cortex, external focus came out as more efficient in the sense the authors define: more points for the same amount of activity, with the correlation between activity and score negative in that condition (minus 0.769) and positive in a neighbouring channel under internal focus (0.626).

From this picture the authors draw their reading: with attention on the sight, control of the movement would be more automatic, while with attention on the body the archers would be spending extra resources in the premotor areas to hold the same score. That is an interpretation rather than a measurement: the scores are the same in both conditions, and what can be seen is that the brain works differently to get there.

The sixteen participants were the top sixteen from the qualification phase of the Chinese national outdoor championship, held in Laixi from 16 to 20 June 2024: male, right-handed, with at least four years of practice and regular training over the previous six months, mean age 16.4 years, 172.3 centimetres and 72.2 kilos on average. Anyone with a shoulder injury or low back pain in the previous three months, or who had taken caffeine or alcohol in the previous twenty-four hours, was excluded.

Shooting was outdoors at 70 metres, on a target face the paper gives as 120 centimetres. Each archer used his own bow and was allowed three or four arrows to set his sight before the formal test. The experiment used a block design: 30 seconds of rest, 30 seconds to prepare and shoot, another 30 of rest, and so on, for six arrows in each of the two conditions, whose order was randomised. The instructions were verbal and specific: under external focus, to keep the sight pin steady inside the gold, let it melt with the centre and follow through on the arrow's flight; under internal focus, to attend to the sensations in the bow arm, the string arm and the rest of the body, using the memory of the movement to find the position and complete a stable shot. To check that the instruction had been understood, each archer had to repeat it back; they were also asked to avoid unnecessary movements such as clenching their teeth or making faces.

The signal came from a portable 48-channel fNIRS system (24 emitters and 16 detectors 3 centimetres apart, sampling at 11 hertz, wavelengths of 730 and 850 nanometres), with probe positions recorded using a three-dimensional digitiser and mapped onto a standard brain atlas. During the tests the head was covered with a black blanket to reduce the effect of sunlight. Each arrow's score was read by an observer with a telescope, with line cutters given the higher value. Processing involved motion artefact correction, a band pass filter between 0.01 and 0.1 hertz and conversion into oxyhaemoglobin concentration, using the mean of the last 5 seconds of each rest period as a baseline. Neural efficiency is derived by normalising scores and oxyhaemoglobin and measuring the distance of each point from the line on which outcome and effort are equal.

Sixteen archers, six arrows per condition, a single session. The sample is all male, all with a mean age of sixteen and all of one level, and the only limitation the authors state is precisely this, that they have no group of less experienced archers to compare against: they could not, they write, because they collected their data during a competition in order to catch the athletes at their best.

The statistical point is more serious. The comparisons run across forty-eight channels, and the p values reported for four of the five significant channels sit between 0.023 and 0.044. The authors say a correction for multiple comparisons was considered, but they report no corrected values: with forty-eight channels, four results just under five per cent are what chance alone produces, and the only one that would survive with room to spare is the right primary motor cortex, at p = 0.005. The power calculation is done after the fact from the effect that was found, so it says nothing about whether the sample was adequate.

Gaps remain on the shooting side. The number of arrows does not match: the abstract says five arrows each, the methods say six. Whether the archers actually followed the instruction was checked by having them repeat it, not by measuring where they looked: the study starts from quiet eye theory but records no gaze. Neural efficiency is a quantity the authors construct from where points fall relative to a line, and the automaticity of motor control is inferred from it rather than measured. The correlation that supports the final reading comes from a channel (28) that is not among those showing a difference in activity, while channel 14, which does show the difference, correlates with score only under internal focus.

The paper also has a presentation problem: the three hypotheses stated in the introduction are referred back to in the discussion with the numbering shifted, and the hypothesis that external focus gives better scores, the first on the list, is not supported.

The most solid finding is also the simplest: in sixteen good archers, being told to concentrate on the sight or to concentrate on bodily sensations did not change the score. The measured effect is 0.12, which is nothing. This counts against the idea, widespread in the motor learning literature, that directing attention outwards improves performance: here, in high-level archers over six arrows per condition, it did not.

What did change was where the brain was working: more in the visual areas with attention on the sight, more in the motor and somatosensory areas with attention on the body. The authors read the second condition as compensation, extra effort to reach the same result, and the first as more automatic control. That is their interpretation of a pattern of activation, and it does not show that an archer does better under one instruction than the other, because the points are the same.

In their implications paragraph the authors reach a practical consideration worth quoting for what it is, a piece of reasoning rather than a result: when the target is hard to see, through darkness or rain, holding attention on the relationship between sight and centre becomes difficult, and in those conditions attention to the body might be the option available. The study tested none of this, since it measured a single day under ordinary conditions.

Anyone coming to this record looking for guidance on what to think about at the moment of release will not find it: six arrows with one instruction and six with the other, in one session, say nothing about what happens over time to an archer who changes where attention goes.