Help with addressing members of an array

The following code works, but I would like to find out if it's possible to address the people objects directly rather than indirectly like in this code. For example, why can't I address the direct object using group[i].members[1].fullName ?

var people = Ti.Contacts.getAllPeople();
var groups = Titanium.Contacts.getAllGroups();
 
Ti.API.info('Group length is ' + groups.length);
 
for (i = 0; i < groups.length; i++)
{   
    Ti.API.info( 'groupname:'+ groups[i].name);
    Ti.API.info( 'members:'+ groups[i].members());
    Ti.API.info('Lenght of '+i+' is '+ groups[i].members().length);
 
var tpeople = groups[i].members();
 
    var text = 'People: ';
    if (tpeople != null) {
        for (var i=0; i < tpeople.length; i++) {
            Ti.API.info( tpeople[i].fullName +', ');
        }
    }
 
}