Confusion Matrix of the best feature set selected from FS2 in Dataset2.

<p>Best Average CCR = <b>90.48%</b> (133/147).</p><p>Features Selected from <i>FS2</i>: A1, V8, V76_RHH, V77_LHH, V1, V2, V4, V5, V13, V14, V16, V17, V24, V29, V19, V23, V27, V33, V31, V34, V35, V37, V36, V38, V39, V43, V44, V46, V47, V48, V51, V52, V58, V62, V63, V70, V71, V72, V74, V70, V71, V67, V68, V69.</p

Models of mixed hierarchical regression (dependent variable: Stress_1–5).

<p>Models of mixed hierarchical regression (dependent variable: Stress_1–5).</p

Illustration of the Activity detection algorithm using MHIs.

<p>Application of the RIT (left) and CIT (right) algorithms.</p

Confusion Matrix of the best feature set selected from FS1 (physiological features) in Dataset1.

<p>Best Average CCR = <b>92.59%</b> (100/108).</p><p>Features Selected from <i>FS1</i>: SD(GSR), Avg1(GSR), RMS1(GSR), SCR_Rate, SCR_Amp, Min(GSR), Max(GSR), SCR_AmpQ75, SCR_AmpQ85, RMS1s(GSR), Avg(IBI), SD(IBI), δ(IBI), δ_norm(IBI), f_d(IBI), Max(IBI), Kurt(IBI), SD2(IBI).</p

Features extracted on the basis of the symmetry vector.

<p>Features extracted on the basis of the symmetry vector.</p

Non symmetric (left) and symmetric (right) action samples.

<p>Non symmetric (left) and symmetric (right) action samples.</p

Features extracted for expressing position and movement of MHI barycenters.

<p>Features extracted for expressing position and movement of MHI barycenters.</p

Confusion Matrix of the best feature set selected from FS2 (behavioural features) in Dataset1.

<p>Best Average CCR = <b>92.59%</b> (100/108).</p><p>Features Selected from <i>FS2</i>: A1, V1, V2, V4, V10, V12, V16, V17, V22, V24, V29, V15, V27, V30, V34, V37, V36, V6, V41, V44, V47, V48, V51, V53, V57, V58, V61, V63, V70, V71.</p

1D RIT Transform of the left image of Figure 5 (left) and 1D CIT Transform of the right image of Figure 5 (right).

<p>1D RIT Transform of the left image of <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0043571#pone-0043571-g005" target="_blank">Figure 5</a> (left) and 1D CIT Transform of the right image of <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0043571#pone-0043571-g005" target="_blank">Figure 5</a> (right).</p

Mixed hierarchical regression per index (dependent variable: Stress_1–5).

<p>Mixed hierarchical regression per index (dependent variable: Stress_1–5).</p