No.;Authors;doi;Year of publication;Study type;Design type;Data analysis strategy;Type of task;Objects;Infants' age (months);Context of interaction;Country
1;Abels & Hutman;https://doi.org/10.1016/j.infbeh.2015.05.004;2015;Experimental;Cross-sectional;Quantitative;Free-play interaction;Toys;12;Laboratory;USA
2;Abels;https://doi.org/10.1037/dev0001094;2020;Descriptive;Cross-sectional;Quantitative;Everyday routines;N/A;9;Home;India
3;Alessandroni et al.;https://doi.org/10.1007/s00426-019-01168-4;2020;Descriptive;Cross-sectional;Mixed-methods;Free-play interaction;Musical toys;2;Home;Spain
4;Amano et al.;https://doi.org/10.1016/j.infbeh.2003.06.005;2003;Experimental;Longitudinal;Quantitative;Free-play interaction;Toys;3-4 ;Laboratory;Japan
5;Aureli et al.;https://doi.org/10.1002/icd.2072;2017;Descriptive;Longitudinal;Quantitative;Free-play interaction;Toys;4-6;Laboratory;Italy
6;Benassi et al.;http://dx.doi.org/10.1016/j.ridd.2015.10.017;2016;Descriptive;Cross-sectional;Quantitative;Free-play interaction;Toys and books;12;Laboratory;Italy
7;Bialek et al.;https://doi.org/10.2478/plc-2014-0008;2014;Experimental;Cross-sectional;Quantitative;Free-play interaction;Toys and books;12;Laboratory;Poland
8;Boundy et al.;https://doi.org/10.1016/j.infbeh.2016.06.005;2016;Descriptive;Longitudinal;Quantitative;Free-play interaction;Toys;10-13;Laboratory;UK
9;Brandone et al.;https://doi.org/10.1111/desc.12880;2019;Experimental;Longitudinal;Quantitative;Free-play interaction;Toys;"(1) 8-9; (2) 6-7";Laboratory;USA
10;Brandone et al.;https://doi.org/10.1016/j.infbeh.2020.101470;2020;Experimental;Longitudinal;Quantitative;Free-play interaction;Toys;"(1) 7-9; (2) 8-12";Laboratory;USA
11;Cárdenas et al.;https://doi.org/10.3389/fpsyg.2020.02030;2020;Experimental;Pre-post test;Mixed-methods;Teacher-led interaction ;Books;4-17;Nursery school;Chile
12;Cleveland & Striano;https://doi.org/10.1016/j.infbeh.2006.10.009;2007;Descriptive;Longitudinal;Quantitative;Experimental interaction;Toys;4-9;Laboratory;Germany
13;Danis et al.;"https://doi.org/10.1002/1522-7219(200012)9:4%3C181::AID-ICD227%3E3.0.CO;2-S";2000;Descriptive;Longitudinal;Quantitative;Free-play interaction;Toys;2-4;Mixed ;France
14;De Barbaro et al.;https://doi.org/10.1159/000351313;2013;Descriptive;Longitudinal;Qualitative;Free-play interaction;Toys;4-12;Home;USA
15;De Barbaro et al.;https://doi.org/10.1111/cdev.12464;2016;Descriptive;Longitudinal;Quantitative;Free-play interaction;Toys;4-12;Home;USA
16;De Schuymer et al.;https://doi.org/10.1016/j.infbeh.2010.12.007;2011;Experimental;Longitudinal;Quantitative;Experimental interaction;Toys;3-9;Laboratory;Belgium
17;Dimitrova & Moro;http://dx.doi.org/10.1016/j.infbeh.2013.06.006;2013;Descriptive;Longitudinal;Quantitative;Free-play interaction;Toys;8-16;Home;USA
18;Dimitrova et al.;http://dx.doi.org/10.1016/j.infbeh.2015.02.015;2015;Descriptive;Longitudinal;Quantitative;Free-play interaction;Toys;8-16;Home;USA
19;Dupertuis & Moro;https://doi.org/10.1007/s12124-016-9350-x;2016;Descriptive;Longitudinal;Qualitative;Free-play interaction;Toys;8-16;Home;Switzerland
20;Flom et al.;https://doi.org/10.1016/j.infbeh.2003.09.007;2004;Descriptive;Cross-sectional;Quantitative;Experimental interaction;N/A;9;Laboratory;USA
21;Gago-Galvagno & Elgier;https://doi.org/10.1016/j.infbeh.2020.101496;2020;Descriptive;Cross-sectional;Quantitative;Free-play interaction;Toys and books;9-13;Laboratory;Argentina
22;Gattis et al.;https://doi.org/10.1016/j.infbeh.2020.101466;2020;Descriptive;Cross-sectional;Quantitative;Free-play interaction;Toys;5;Laboratory;UK
23;Guevara et al.;https://doi.org/10.1007/s10212-019-00444-6;2020;Descriptive;Longitudinal;Qualitative;Teacher-led interaction ;Toys;4-11;Nursery school;Spain
24;Hobson et al.;https://doi.org/10.1111/j.1469-7610.2004.00238.x;2004;Experimental;Cross-sectional;Quantitative;Experimental interaction;Toys;12-14;Laboratory;UK
25;Legerstee et al.;https://doi.org/10.1016/j.infbeh.2006.10.003;2007;Descriptive;Longitudinal;Quantitative;Free-play interaction;Toys and books;3-10;Laboratory;Canada
26;Mendive et al.;https://doi.org/10.1016/j.infbeh.2012.10.002;2013;Descriptive;Cross-sectional;Quantitative;Free-play interaction;Toys and books;9;Home;Chile
27;Moreno-Núñez et al.;https://doi.org/10.1007/s12124-015-9298-2;2015;Descriptive;Longitudinal;Mixed-methods;Free-play interaction ;Toys;2-6;Home;Spain
28;Moreno-Núñez et al.;http://dx.doi.org/10.1016/j.infbeh.2017.09.003;2017;Descriptive;Longitudinal;Quantitative;Free-play interaction;Musical toys;2-4;Home;Spain
29;Moreno-Núñez et al.;https://doi.org/10.1017/S0305000919000606;2020;Descriptive;Longitudinal;Mixed-methods;Free-play interaction;Toys;9-13;Home;Spain
30;Moreno-Núñez et al.;https://doi.org/10.1016/j.infbeh.2021.101645;2021;Descriptive;Cross-sectional;Quantitative;Free-play interaction;Toys and books;9;Home;Spain
31;Osório et al.;https://doi.org/10.1016/j.infbeh.2011.07.005;2011;Descriptive;Cross-sectional;Quantitative;Free-play interaction;Toys;10;Home;Portugal
32;Palacios & Rodríguez;https://doi.org/10.1002/icd.1873;2015;Descriptive;Longitudinal;Mixed-methods;Free-play interaction;Toys, artifacts and natural objects;9-15;Home;Spain
33;Palacios et al.;https://doi.org/10.1080/02109395.2015.1122437;2016;Descriptive;Longitudinal;Quantitative;Free-play interaction;Toys, artifacts and natural objects;9-18;Home;Mexico
34;Palacios et al.;https://doi.org/10.1007/s12124-018-9422-1;2018;Descriptive;Longitudinal;Mixed-methods;Free-play interaction;Toys, artifacts and natural objects;9-15;Home;Spain
35;Parise et al.;https://doi.org/10.1016/j.infbeh.2006.10.006;2007;Experimental;Cross-sectional;Quantitative;Experimental interaction;Toys;10-12;Laboratory;Germany
36;Perra & Gattis;https://doi.org/10.1016/j.infbeh.2012.06.004;2012;Descriptive;Longitudinal;Quantitative;Free-play interaction;Toys;2-4;Laboratory;UK
37;Rollins & Greenwald;http://dx.doi.org/10.2190/IC.32.4.c;2013;Descriptive;Longitudinal;Quantitative;Free-play interaction;Toys;6-12;Laboratory;USA
38;Rossmanith et al.;https://doi.org/10.3389/fpsyg.2014.01390;2014;Descriptive;Longitudinal;Qualitative;Free-play interaction;Toys and books;3-12;Home;UK
39;Schneider et al.;https://doi.org/10.1111/desc.13281;2022;Descriptive;Longitudinal;Quantitative;Free-play interaction;Toys and books;3-12;Home;USA
40;Serra et al.;https://doi.org/10.1016/j.infbeh.2020.101438;2020;Descriptive;Cross-sectional;Quantitative;Free-play interaction ;Toys and books;12;Laboratory;Portugal
41;Simaes et al.;https://doi.org/10.1016/j.cogdev.2021.101141;2022;Descriptive;Cross-sectional;Quantitative;Free-play interaction;Toys and books;9-13;Home ;Argentina
42;Striano & Bertin;https://doi.org/10.1348/026151005X26282;2005;Experimental;Cross-sectional;Quantitative;Experimental interaction ;Toys;5-10;Laboratory;Germany
43;Striano & Stahl;https://doi.org/10.1111/j.1467-7687.2005.00421.x;2005;Experimental;Cross-sectional;Quantitative;Experimental interaction;Toys;3-9 ;Laboratory;Germany
44;Striano et al.;https://doi.org/10.1016/j.infbeh.2006.12.010;2007;Experimental;Cross-sectional;Quantitative;Experimental interaction;Toys;1.5-3 ;Laboratory;Germany
45;Trautman & Rollins;https://doi.org/10.1017/S0142716406060358;2006;Descriptive;Cross-sectional;Quantitative;Free-play interaction;Toys;12 ;Laboratory;USA
46;Tremblay & Rovira;https://doi.org/10.1016/j.infbeh.2006.10.004;2007;Experimental;Cross-sectional;Quantitative;Experimental interaction;N/A;3-6 ;Laboratory;France
47;Vietri et al.;https://dx.doi. org/10.24215/2422572Xe089;2021;Descriptive;Longitudinal;Qualitative;Everyday routines;Artifacts;6-12 ;Home;Argentina
48;West & Iverson;http://dx.doi.org/10.1016/j.cogdev.2017.05.004;2017;Descriptive;Longitudinal;Quantitative;Free-play interaction;Toys;10-14;Home;USA
49;Yu & Smith;https://doi.org/10.1371/journal.pone.0079659;2013;Experimental;Cross-sectional;Quantitative;Free-play interaction;Toys;11-15 ;Laboratory;USA
50;Yu & Smith;http://dx.doi.org/10.1016/j.cub.2016.03.026;2016;Experimental;Cross-sectional;Quantitative;Free-play interaction;Toys;11-13 ;Laboratory;USA
51;Zuccarini et al.;https://doi.org/10.1016/j.jcomdis.2018.09.004;2018;Descriptive;Longitudinal;Quantitative;Free-play interaction;Toys, books, musical toys;6-12 ;Laboratory;Italy
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