
Figure 1
Power for the interaction effect between Concreteness and flanker presence at multiple levels of observations per condition.
Table 1
Overview of the participant descriptives.
| ENGLISH | DUTCH | |
|---|---|---|
| Percentage used | 39.6 (27.3) | 58.8 (27.5) |
| Reading fluency | 6.6 (0.6) | 6.9 (0.3) |
| Speaking fluency | 6.1 (0.9) | 6.6 (0.6) |
| Writing fluency | 5.9 (1.0) | 6.4 (0.7) |
| AoA | 10.6 (2.7) | N.A. |
| LexTale | 87.3 (14.3) | N.A. |
[i] Note: Values between parentheses indicate standard deviations.
Table 2
Overview of the stimuli properties.
| ENGLISH | DUTCH | |
|---|---|---|
| Target Frequency1 | 4.30 (0.47)a | 2.72 (0.96)b |
| Flanker Frequency | 4.78 (0.38)a | 3.51 (0.58)b |
| Target & Flanker Length | 5.00 (0.82) | 5.03 (1.15) |
| Target Concreteness | 4.77 (0.28)c | 4.60 (0.46)d |
| Flanker Concreteness | 2.88 (0.92)c | 2.36 (0.75)d |
[i] Note: Values between parentheses indicate standard deviations.
aSubtlex-UK (van Heuven et al., 2014).
bSubtlex-NL (Keuleers et al., 2010).

Figure 2
Descriptives for the RT data for all conditions. Error bars depict standard errors. Language refers to target at trial n, switch/repetition bars refers to the target language at trial n compared to the target language at trial n-1. REP. refer to repetition trials.

Figure 3
switch costs in RT plotted per participant with and without the presence of flankers. The figure on the left side depicts Dutch (L1) trials and on the right English (L2) trials. Switch costs are depicted as switch trials – repetition trials.
Table 3
Descriptives for RTs.
| DUTCH | ENGLISH | |||||
|---|---|---|---|---|---|---|
| SWITCH | NO SWITCH | SWITCH COST | SWITCH | NO SWITCH | SWITCH COST | |
| Flanker present | 595 (208) | 578 (200) | 17 | 592 (191) | 591 (196) | 1 |
| Flanker absent | 585 (214) | 565 (216) | 20 | 609 (211) | 552 (180) | 57 |
[i] Note: Values between parentheses indicate standard deviations.
Table 4
LMM analyses for RTs.
| FACTORS | FREQUENTIST LMM | BAYESIAN LMM | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| B-VALUE | SE | T-VALUE | ESTIMATE | ERROR | LOWER BOUND | UPPER BOUND | ^R | BULK ESS | TAIL ESS | |
| Flanker presence | 1.31 | 0.55 | 2.39 | 0.022 | 0.009 | 0.003 | 0.042 | 1.00 | 20031 | 35401 |
| Language | 0.28 | 0.58 | 0.49 | 0.009 | 0.009 | –0.008 | 0.026 | 1.00 | 20278 | 34405 |
| Trial type | 0.56 | 0.48 | 1.16 | 0.004 | 0.011 | –0.017 | 0.024 | 1.00 | 22531 | 37757 |
| Flanker × Language | 0.29 | 0.83 | 0.36 | 0.011 | 0.012 | –0.013 | 0.036 | 1.00 | 21094 | 35919 |
| Flanker × Trial type | 0.59 | 0.69 | 0.87 | 0.006 | 0.015 | –0.023 | 0.036 | 1.00 | 18492 | 33965 |
| Language × Trial type | 1.55 | 0.79 | 2.28 | 0.030 | 0.012 | 0.006 | 0.054 | 1.00 | 21385 | 35332 |
| Flanker × Language × Trial type | –2.04 | 0.96 | -2.12 | -0.037 | 0.017 | –0.071 | –0.004 | 1.00 | 20906 | 38016 |
Table 5
descriptives for error rates.
| DUTCH | ENGLISH | |||||
|---|---|---|---|---|---|---|
| SWITCH | NO SWITCH | SWITCH COST | SWITCH | NO SWITCH | SWITCH COST | |
| Flanker present | 9.75 (0.70) | 8.79 (0.72) | 0.96 | 7.06 (0.74) | 7.89 (0.73) | –0.83 |
| Flanker absent | 11.86 (0.68) | 6.13 (0.76) | 5.73 | 8.08 (0.73) | 4.91 (0.78) | 3.17 |
[i] Note: Values between parentheses indicate standard deviations.
Table 6
LMM analyses for error rates.
| FACTORS | FREQUENTIST LMM | BAYESIAN LMM | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| B-VALUE | SE | Z-VALUE | ESTIMATE | ERROR | LOWER BOUND | UPPER BOUND | ^R | BULK ESS | TAIL ESS | |
| Flanker presence | –0.17 | 0.21 | –0.79 | –0.15 | 0.20 | –0.55 | 0.25 | 1.00 | 35493 | 46639 |
| Language | 0.23 | 0.21 | 1.06 | 0.24 | 0.20 | –0.15 | 0.63 | 1.00 | 38165 | 47123 |
| Trual type | –0.20 | 0.21 | –0.95 | –0.18 | 0.21 | –0.58 | 0.22 | 1.00 | 38628 | 50024 |
| Flanker × Language | –0.08 | 0.28 | –0.29 | –0.10 | 0.26 | –0.61 | 0.41 | 1.00 | 35303 | 46924 |
| Flanker × Trial type | 0.19 | 0.30 | 0.62 | 0.15 | 0.28 | –0.40 | 0.70 | 1.00 | 35862 | 46979 |
| Language × Trial type | 0.24 | 0.27 | 0.90 | 0.22 | 0.25 | –0.27 | 0.71 | 1.00. | 37387 | 48924 |
| Flanker × Language × Trial type | –0.15 | 0.38 | –0.39 | –0.12 | 0.34 | –0.77 | 0.55 | 100 | 37817 | 49371 |
| ENGLISH | DUTCH | ||
|---|---|---|---|
| TARGET | FLANKER | TARGET | FLANKER |
| army | feed | leger | kwaad |
| city | fuel | stad | niks |
| lion | duty | leeuw | spijt |
| cave | flow | grot | kijk |
| road | wise | weg | tof |
| barn | soul | schuur | gelijk |
| pool | fake | zwembad | rotzooi |
| lawn | riot | gazon | buurt |
| bull | whom | stier | flauw |
| gown | rush | gewaad | vlucht |
| plane | story | vliegtuig | waarschuw |
| tower | final | toren | dwaas |
| whale | music | walvis | eender |
| field | truth | veld | grap |
| crowd | state | volk | tijd |
| floor | taste | vloer | angst |
| cabin | power | hut | mal |
| hedge | trust | haag | kind |
| coast | every | kust | gaaf |
| vault | speed | kluis | zonde |
| garden | bottom | tuin | dank |
| church | damage | kerk | slim |
| bridge | common | brug | ziel |
| stairs | nobody | trap | ding |
| throne | liquid | troon | hekel |
| sailor | extent | zeiler | lokaas |
| shower | actual | douche | partij |
| galaxy | choice | heelal | strijd |
| shovel | spirit | schop | reden |
| convoy | threat | konvooi | plezier |
| salt | gosh | zout | deel |
| bowl | tune | schaal | wonder |
| bean | loud | boon | stil |
| toes | firm | tenen | smaak |
| leaf | host | blad | keus |
| disc | meal | schijf | waarde |
| tear | posh | traan | beeld |
| seed | load | zaad | plek |
| plum | hero | pruim | geval |
| rice | mood | rijst | bevel |
| teeth | proof | tanden | risico |
| honey | stuff | honing | weldra |
| diary | sweet | dagboek | cultuur |
| brush | space | borstel | waanzin |
| spoon | death | lepel | vraag |
| shell | front | schelp | aardig |
| snail | order | slak | stem |
| candy | issue | snoep | macht |
| straw | civil | rietje | afloop |
| thumb | sense | duim | raar |
| cheese | amount | kaas | moed |
| bottle | injury | fles | maat |
| rabbit | scheme | konijn | geloof |
| button | relief | knop | paar |
| salmon | member | zalm | vrij |
| throat | favour | keel | zorg |
| cotton | appeal | katoen | schuld |
| pebble | action | kiezel | proost |
| carrot | genius | wortel | ingang |
| ribbon | wealth | lint | gauw |
